i ve been doing kung fu and also kickboxing for several years. kick boxing is fine and easy to pick up the basics plus it ll send your fitness levels through the roof. it ll also help condition you to throw and take punches which would help however it is still a sport so what you are learning is still confined by rules and the fact you have gloves on so cant grab. in my kung fu system we have a specific section on dealing with multiple attackers.
rule 1 ; RUN AWAY FAST (in the opposite direction)
rule 2 ; DISTRACT AND RUN AWAY ( SHOUT, SCREAM, FOAM AT THE MOUTH)
rule 3 ; EVEN THE ODDS ( look around see if there's anything you can use to your advantage, like say a forsale sign. then pick it up swing it at them and run away.)
if you are cornered and have to go past them to get away.
rule 4 ; TAKE THE ONES ON THE OUTSIDE OF THE GROUP ONCE PAST THEM RUN AWAY ( try not to turn your back on , or go between any of them.)