You’re not starting over from scratch. You’re starting over with experience. Never forget that.
Getting fired could be the best thing for you because it gives you a chance to start something new.
You’ve already taken the L, so why not try something new? At least in a worst-case scenario, you know you can always go back to that same field.
When everyone is telling you NO, maybe it’s just life‘s way of telling you to GO and try something new.