As a new player for HOTS, what should I do RIGHT NOW?

Downloading the game as we speak, what should I do now while the event is active? I know I can play 5 games a day to get some free stuff, but what other things should I do now before its 2 late?

Also which Bundle is the best? I come from LoL so I know my MOBA and I like playing Jungle / ADC the most but can fill.