No trials set he is causal. He want one crafted an an overland at least in the start, then I would go for one of the easy dungeon monster sets.Okay great, with CP240 you're past the gear cap, so you can go ahead and create/farm gear for actual builds.
As you noticed, overland/questing content is easy enough that you can go with any "build" you like. Continue playing as you want there, since you don't seem to have any trouble.
For group content (I only do PvE), you could use Alcast's page and builds as a starting point and source of hints which weapons and skills to use.
https://alcasthq.com/eso-magicka-templar-build-pve/
https://alcasthq.com/eso-stamina-templar-build-pve/
For stamina group PvE, you generally want Dual Wield/Bow or Two-Hander/Bow. The combination you listed, 2H/2H and 2H/DW, will severely impact your DPS.
Both magicka and stamina templar are good in group PvE. Not top-notch, but since that's not what you're going for, you're going to be fine. Next patch, some currently broken damage calculation especially for magicka templar is going to be fixed, so this is the right time to get into magplar again.
I leveled up both a stamplar and magplar during the last double XP event. Skill-wise I mostly follow Alcast's builds. Gear-wise I use the rather standard Julianos/Moondancer/Skoria on my magplar (you can also use Infallible Aether or Willpower instead of Moondancer), and Hundings/Spriggan/Velidreth on my stampar. Good alternatives for Velidreth - if you don't want to farm vet Cradle of Shadows - are Kra'gh, Selene and Stormfist.
No trials set he is causal. He want one crafted an an overland at least in the start, then I would go for one of the easy dungeon monster sets.
I’m writing this post assuming you want to stay a stamplar. You like it...let’s go with it. I’m going to pull up my stamplar, then suggest a starter setup for a casual player. This is going to get you to a baseline and you can make adjustments from there.
General character adjustments
Attributes: put them all into stam. If you mixed them, just go recast them. You can fine-tune your health with enchantments and you don’t need magic here.
Champion Points (300 config)
This configuration is for casual play. It focuses on stacking points in the passive you will be using most. I move away from a trial setup here a bit...in casual play you don’t break free as much, so it’s less important.
Green: 75 mooncalf, 15 tenacity, 5 arcanist, 5 healthy.
Why? This is all about recovery, which is especially vital in PvP. As you earn your next hundred CPs you can branch out a bit, but focus on recovery first.
Red: 30 ironclad, 35 hardy, 35 elemental defend
Why? These are your core defensive passives, and at max cp you’re going to keep pumping into these. You’ll bring in some other passives depending on your play style, but most red points go into these so keep on spending here.
Blue: 45 mighty, 20 precise strike, 35 thaumaturge.
Why? Here you have more flexibility depending on how you use your skills. Mighty is a focus because it affect most of your damage skills. Thaumaturge will boost your jabs, so it’s a powerful passive for you. Then precise boosts your crits. As you continue to earn CPs you can add some in piercing.
Gear farm
The era of farming is OVER!
Ok, not entirely, but kinda. Because you can now transmute items, you don’t have to run a dungeon 800 times for a desirable trait. Even playing casually, you’ll get enough transmute stones in PvP to change traits on your gear. So don’t fear doing some casual trial runs if you see a set you really want.
That said, let’s get you a setup that is easy to obtain and will be within 2% of BiS gear performance.
Base set: Hundings rage. It’s an all-around top performer for stamina, and especially helps a Templar with dps, where they’re a bit weak. Make your weapons Hundings, because then you can control the trait. Also, weapons are good to make gold, and Hundings is a really versatile set where you’ll get a lot of use out of gold gear. Nirnhoned is best for the front dagger/sword, but you can go sharp or precise and be just fine.
Your base set is where you can bring in second pieces if you need heavy or impen for PvP. The mats are pretty dang cheap, so make three pieces in divines for pve, then impen for PvP.
Secondary set: spriggans. This is easy to farm in Bangkorai. Feel free to start with blue (or even green) jewelry. It’s not that big a step up to purple...worth it if you like the set and stick with it, but not necessary.
Alternative: Briarheart. I just happen to love this set. It’s a bit of a pain to farm...I’d recommend farming motifs or raw mats for gold tempers, selling those, then buying the gear.
Monster helm: if you hate farming vet dungeons, just wait for the weekend golden to carry a helm then farm the shoulders. Transmute means you don’t get dinged for buying the helms any more! Any stamina dps helm set works, but stormfist and velidreth are top performers for templars.
Other things to work on
These are little side projects you can undertake to get the most out of your character...since you say you’re pretty noob.
If you haven’t, work fighters guild to ten. Close dolmens...it won’t take long. The ultimate, flawless dawnbreaker, helps raise your damage significantly.
Slooooowly work your undaunted. This only levels by running dailies from the undaunted enclave. It takes for-flipping-ever, but there are some good passives that unlock at levels 7, 8 and 9. It’s 200 undaunted points per level. Normal dailies reward 10, vet is 20. When you’re on your own, run Bogrul’s delve daily. It’s worth 5 points...and they’re super fast.
Work legerdemain to 16. This allows you to spend and reduce your sneak cost by 40%...very helpful in PvP. To do this fast, every once in a while empty your inventory then go to the ships in daggerfall. There are few npcs...rob everything. Fence it all. It’ll take a bit, but it’s a quick grind if you do it this way. If you want to go even faster, spend one point in trafficker to allow 240 fence transactions per day, instead of 100.
Hope that helps. Good luck!