I can relate a lot with this. Also have tried a lot of things and was even excited about them at the time, but now all the excitement is gone and I cannot make mysef get it back.
Changed hobbies, learned stuff, planned new carreer(s), ended relationship, changed beliefs and worldviews. Always being so sure that now this will be it.

Now I'm still trying, but don't have the motivation anymore and I'm terrified I need to decide because of my age, but I can't, just drifting.
I have no job now either and also live in a place with no ties really.

Sorry this wasn't helpful, I can only say "me too" on this one...