Have an Answer?
Is there any subject that interest you? or when you were still in school was there any subject that you did really well or your feel you like it? If you do, I would suggest to start from there.
If not, do you have any friends that are going to take classes at the school you are planning to attend? If yes, just take a class with he/she.
Or try to think about what you like to do either as a hobby or just in general. And look into volunteer opportunities in that area.
I hope those suggestions help