I'm 45 years old, 5'6 and weigh 155 lbs. Zero martial arts training / zero fighting experience. I'm looking to attain some self defense skills / greater confidence dealing with a-holes. There is a Krav school and kung-fu school near me but not sure which is better suited A) for my size / weight B) which one will give me the most skills in the shortest period of time. Any advice would be great. Thanks.