1) Make sure to let the paint fully harden before you wash it for the 1st time(typically 3-5 days depending on temp)
2) You don't want to over wax a car cause it'll never look right,stick with a brand name wax and use their recommendations as a rough guide. If the car is garage kept then wax less. Outside,then as often as they recommend.
3)Whatever you do DON'T EVER LET BIRD CRAP OR BUG CRAP SIT ON THE PAINT!! Bird poop is the worst,it'll eat the wax and half the clear-coat if it's left on for too long (1-2 days)
4)Wash as often as you want as long as you use a car specific wash. Wax-see above. Don't polish until the paint shows signs of wear. You shouldn't have to for the first year or two at least.