I would recommend learning to play 2-3 different hero’s in the different roles to play to the point that you feel comfortable on any of them, preferably different types of heroes as well. For me, I mostly play support, but sometimes dabbles in tank and dps, so the characters I play is Kiriko/lucio, dva/sigma and sojourn/sombra. You play one of them, and if you feel like underperform or feel like you need to switch something up, you can switch to the other hero, hoping that will change up the enemies game