Terran would be best to start off. Each race are equal and take a different talent to really be good at to handle a race.
Like the zerg are for pro mircros and rushers. Protoss are usually for mid to hi pushers, and require good macro and unite structure
Terran are all start and power, good unite combos and timing etc.
But i play terran and use 3 hellion drops, 4 barrack rushes, 2 barrack + zergling rushes, all kinds of stuff.