Really your main goal is getting to cp160. That is the gear max. How you do it is up to you. Questing in your silver zone, dlc areas, dungeons, PvP, whatever. At cp160 then you can focus on gear grinding.

Just go where your heart takes you I open areas wayshrines world bosses, delves, areas of interest, dolmens before I actually will do quests.

All the zones are now the same (max) level, with you being scaled to them rather than them to you, and there're no restrictions to going into different alliance zones now(and, as you may have noticed, the world is no longer split in alliance based shards, now ad, ep and dc can all be together in the same town in PvE world) so you can just enjoy the journey without having to worry about outleveling your zone or anything

A few things to keep in mind - the way Battle Leveling works, it will scale you most effectively if the gear you use is as close to your level as possible, further away it is, worse your stats will be. So if you find yourself struggling, just make/buy/find some new gear of your current level, eat a food(there're some really nice recipes out there now too that scale to you whatever your level is, which is very convenient while leveling) and off you go!

Like been said, 160 cp is the max for gear atm(600 cp is max cp you can use overall), but given it's your first playthrough, wouldn't say there's any rush to get there if you just enjoy questing and exploring. Also, champion points are account wide so any new toon you make will be able to use those you've already earned(although they'll only be able to earn champion points themselves once they hit level 50 - after which they'll automatically become cp level <however many cp points your account has>).