So depressed (again)

I've wanted to a webcomic of something so badly for so long, but it just seems like there's this invisible barrier in front of me.  Actually, the barrier is always around me, but I feel it more acutely whenever I try something creative.  I can see whole pages fully laid out in my mind, I just don't know how to get there.  I was trained as a classic artist (painting, drawing, etc), never as a digital artist.  When I was in college, digital art was considered a computer class NOT a art one.  Basically everything I've done so far has been self-taught.  I think I'd do better if someone was peaking over my shoulder and telling what to do/not to do...of course I don't have anyone like that in my life, since I don't have a life outside of working and coming home and disappointing myself playing Overwatch.

I guess this is all coming to a head because I turn 42 next year, and I wonder what I did with my life, and what I can do with what I have left... whenever I do something that isn't art if feels like I'm wasting time, but doing art makes me sad sometimes.  I know I've made some progress, but is it really progress and is it fast enough?  I feel like I'm on a timer.  Add to this I tried to join a dating site, and I realized any girl I'd be interested in is probably not going to be interested in someone my age.  I quit after 8 hours because I realized that you have to pay to read messages...what a scam.