Start a new character in Abyss League.
Kill shit.
Pick up loot.
Repeat.
Seriously though, not understanding shit is half the fun in this game. I just spent 2 hours lazily browsing youtube and putzing around with lightning tendrils/arc build. I ended up having no intention to play the build, but PoB is pretty fun. My wife first saw me playing around with the passive tree and she said it looks like fun, like it's some giant puzzle(it is).
Daunting at first, definitely. But damn does this game hit that sweet spot of complexity but *almost* none of the side effects of a typical MMO game where you usually have to find said complexity. No more waiting for 5 late guild members to sign on and then wade through hours of trash just so you can get to the interesting dps mechanics of your build.
Fuck, almost talked myself into buying another supporter pack. Release the damn Abyss packs already so I can make a decision!