I'd recommend starting out in a no CP campaign. Let's see... as for general purpose advice, I'd say you want:
1 damage set and 1 regen set
At least 5 impen
1 attack bar with sharpened weapons, made for killing
1 defense bar with defending trait weapons, made for staying alive
You want at least 1 defensive skill on both bars
Whenever you are not trying to kill something, always be on your defending backbar. Don't get caught with your pants down by a ganker.
Learn to survive an initial attack (often, immediately break free then dodgeroll). You will fail until you succeed lol
Figure out how to regain your composure with defense without depleting all of your resourses
Once you are back on equal footing, fight back. Learn to 1v1, you can practice with duels.
After you have a basic handle on your build, find the biggest thing wrong with it, for you. Fix that. Repeat.
Do all this and I daresay you will be able to 1vX. The thing about 1vXing is no one else's build will fit you as perfectly as it fits them. They fine-tuned it for themselves. You can learn from their insights, but unless you play the exact same way as them naturally, your results won't be the same. Oh, an another thing is know your opponents. If you don't know what they can do, they will catch you off guard and kill ya.
Also, idk how much vMA is training for PvP, but I have yet to see a flawless conqueror who couldn't handle themselves in PvP. You'll need the same attention to detail and control, though you will use it in different ways.
I'd recommend starting out in a no CP campaign. Let's see... as for general purpose advice, I'd say you want:
Whenever you are not trying to kill something, always be on your defending backbar. Don't get caught with your pants down by a ganker.
Learn to survive an initial attack (often, immediately break free then dodgeroll). You will fail until you succeed lol
Figure out how to regain your composure with defense without depleting all of your resourses
This is sort of at the crux of my problem. If I'm just walking back from the re-spawn point toward the action and out of nowhere an invisible player inst-kills me and then vanishes again, what did I learn?
When I was a lvl 10, I randomly and with no preparation went into PvP for the first time, got obliterated a dozen times by invisible attackers, and left unhappy.
Simple really slot a move that knocks people down slot another to close the gap slot a high damage move a heal and whatever you want on move 5 it's simple it's boring everyone does it and 75% of your kills will be cheap hollow victories from knocking someone down then kicking the crap out of them before they get up. Use spriggins night mothers gaze druegh limbs blah blah blah increase pen in cp reduce their armor to nothing make sure you are using inpen enchantments reduce critical damage blah blah blah as i said boring.
Simple answer - you will get beaten and obliterated many times before you get better. Same as any PvP game you start where there are people there before you and have experience.
Noone just enters Cyrodiil and wins, those who do took time to learn and be good at it - and at the begining got beaten and battered just like you.
People become pros, they aren't born as such, they all faced the same hardships. And if you aren't prepared to take a beating, you will never learn.
Step one is to adjust your mindset for what I just said, and only then think about builds and skills.