First Upgrades?

Hey Everyone,

I recently picked up aGranite Grom for my stepson and after seeing how quick it was compared to Walmart toys, decided to get a Typhon Grom for myself. They've both been sweet so far, but being new to the hobby as well, I was curious what kind of upgrades you all might recommend first. Eventually I'd like to upgrade the motor/esc to make them 3s capable, but for now I'm just thinking differentials, shocks, maybe dogbones and whatnot, etc.

Thanks in advance!