In another life I found some SIGS, special interest groups, in various areas of computing in the 1990's. They were a little hard to find and were almost underground but they were thriving if you could find them. Interestingly, their members were nearly all mature age folk who had found where they wanted to be with their interests. From these groups, you will find a path. Further, short courses at technical colleges may be of interest, was for me.