Everything is about options. This video provides some concepts in dealing with an attack of this nature. We need to be free flowing and in any situation. When in doubt, hit them in the head.
This is a great drill you should be able to do in most indoor ranges it will help you practicing failure to fire with tap rack solution, mag changes and reacquiring Target, sight picture, sight alignment Etc.
It’s all about the basics nothing else. Garment clearing, establish grip, draw stroke, sight picture sight alignment, trigger pull and follow through. Rinse and repeat.