Yeah I am 60 and have lost count of the types of bands I have worked in. When I moved to this area from the northeast, in 1980, you couldn't play blues here. Kind of like today, except I do it anyway now pretty much all the time. But back then I worked at any kind of gig, country, reggae, beach music (local thing), dance band, whatever I could do to pay the bills and learn another guitar skill while I was at it, but always tried to find a place I could play blues on my night off just to stay sane. As far as upthread, with the learning to sing: do it. The worst that can happen is you will suck, but that won't make you any different from a lot of other people out there being paid to suck. You can get better and the best way to get better is on the job in front of an audience. No better training. And maybe you won't suck in which case, even better. I do not think of myself as a singer as I have worked for and with real singers, but I finally stated singing simply so I could do the music I loved and after maybe ten years of it got pretty comfortable doing it. Same situation.. good luck.