o/
welcome back
pve and pvp, imo, are quite different
even if you plan to play solo, imo, you should join a corp
if you want to improve in pve, yes, run the quest chains, but you would benefit from joining a corp, where you will get friends, advices, help, fittings, etc
If you want to get good at pvp, that’s quite different, and you would also benefit from joining a corp (FW, wormhole, low sec, null sec,…) where you will get friends, advices, help, fits, etc
Just find a corp which allows you to play when you want