I have been playing guitar for roughly 15 years now. Might I add on and off but I’ve recently noticed that my thumb, holding the pick, is curved in an awkward bend position. It allows me to tremolo pick pretty fast/pinch harmonics are no issue, however the pick becomes less stable and moves quite a bit compared to what I am practicing with the “correct” way to hold a pick now. In your opinion is it worth to even start from scratch or should I just continue on playing this way?