[denzil]

Feeling quite similar and only a little bit younger than you. I just rediscovered LessWrong (because of Pokemon fanfiction) and I think it might be worth for you to have a look at the Hammertime series: https://www.lesswrong.com/s/qRxTKm7DAftSuTGvj

LessWrong has it's problems, like lots of jargon, but this series seems like good tool to clean up life a bit. Especially I recommend having look at the Aversion factoring and Goal factoring, those two seem to be the most useful ones to deal with having lost some kind of "life purpose". Though I have to admit I still haven't found my solution, so take my post with a grain of salt. But at least I feel like I'm working on it in the right direction.