Considering I lead with my middle finger and brace on my index finger for weight / it's just in my way.... i think you're totally fine lol (I don't hold a paint brush like this but makes it oddly easy for chopsticks cause I brace the "bottom" one in the fat of my thumb/index finger area)
edit: sometimes when I draw for a long period of time, my ring finger will have a dent where the pen rests at sometimes and be sore lol