Hi David, I hope this message finds you well. Listen to this video and think it over. I admire Mike Stern very much for he is as humble as he is a terrific player. I can't tell you exactly what to do because you know your situation better than anybody else, but my advise is to develop your own playing technique with the tools you have (well, read fingers). You can still play rhythm guitar like a god and be second to none. You can also play solos with your index, middle and ring finger. This is what I would do, don't try to mimic other players, who can hold a pick, just be yourself and be proud of it. You'll get there.