Path of Exile Resources

Popolac

Passive Tree Planner - https://poeplanner.com/
Path of Building Character planner on steroids - https://github.com/Openarl/PathOfBuilding/releases

Youtubers -
ZiggyD - PoE News, Guides, Streams
EnginneeringEternity - High quality PoE guides

PoE Wiki - https://pathofexile.gamepedia.com/Path_of_Exile_Wiki

RenoWrench

I guess the whole point is to get a character upgraded with an Ascendancy class so you can do end game content?

Popolac

That, and then the next step would be familiarizing yourself with the game enough to compete in the hardcore leagues and/or special event races and wiiiiiiiiiiiin.