I’ve studied several martial arts over 40 years. Here’s my 2 cents:
1. if you’re gonna train, do it seriously, steadily, for a long time. A little training with a big ego can get you killed quick.
2. your best weapon is the element of surprise. learn to feign weakness until they relax for a split second then jam your fingers as deep into their eyes as you can.
3. leave asap
Hand to hand against a mob is never a good idea. I prefer a tactical advantage.