I see other people on here say this but I think it is so important that it can be said again. WRITE, WRITE, WRITE! As you read and learn I think it is so important to write. I suggest a mixture of notes, journal entries, and short essays. The more you do this the more your thoughts will gain clarity and you will see themes emerge from what you are doing.
As far as finding 'what to do with it'. I think that will develop over time as you talk with people about your interests. Share your writings as best as you can and join discussions. See if there are local MeetUp (or something similar) groups on the topics that you find most interesting. If so, join them and go to discussions. Ask if you can give short presentations on topics to the group. If you find a book or essay particularly interesting then send an email to the author.
Another trick that has worked for me; Some famous authors can be sometimes really hard to reach. But look at the work that they cite. Usually you will find some academic paper that they quote or reference. Look up the author / authors of those papers and read about them and contact them directly. Professors LOVE to talk about their work and usually (from my experience) they are happy to talk to people about their research who have read their papers. From those conversations you might find a path to a career or hobby that make you feel fullfilled. Enjoy the journey.
As far as finding 'what to do with it'. I think that will develop over time as you talk with people about your interests. Share your writings as best as you can and join discussions. See if there are local MeetUp (or something similar) groups on the topics that you find most interesting. If so, join them and go to discussions. Ask if you can give short presentations on topics to the group. If you find a book or essay particularly interesting then send an email to the author.
Another trick that has worked for me; Some famous authors can be sometimes really hard to reach. But look at the work that they cite. Usually you will find some academic paper that they quote or reference. Look up the author / authors of those papers and read about them and contact them directly. Professors LOVE to talk about their work and usually (from my experience) they are happy to talk to people about their research who have read their papers. From those conversations you might find a path to a career or hobby that make you feel fullfilled. Enjoy the journey.