so im going to start taking up boxing

[FATAL]

http://www.everlast.com/freestanding-reflex-bag.html

brought that ^^^ and some gloves

i wanna take it slow before i start hitting a heavy bag probably in a month or two. i wanna learn how to wrap my hands and all that sh!t before going full board.
the reason i wanna start boxing is to improve my cardio. i realized besides playing basketball maybe once a week i really didnt do much to stay in shape so i wanna have something to build my endurance and to stay in shape without having to drive up to the gym.
how should i start? boxing 3-4 times a week for 30 mins at a time?

[2Quik4U]

I'm joining a gym once I get the money for it, but all I really wanna know is what foods I should eat to get the most energy as possible. I'm not in shape like that so I know the training is gonna be rigorous.