New player not really sure what to do or what other classes to level (unfunded on reboot have about 200m)

So I am a new player I started with a demon slayer because i taught they looked good and they also was the chacter i burned i have decent frozen gear what is my goal here i know late game gear is good bbut there semms to be laods I am missing out on and am a bit overwhelmed. Also am on gms.