... You can start at your Master breaker panel. I installed Square-D Hospital grade 30AMP breaker ... I’ve used Sq-D 30AMP single pole/Dual function-CAFCI/CFCI
No it doesn’t require an electrician ... If you don’t have a ground rod. Home Depot carries them. Even if you are a renter ...
I'm not sure what the benefit of a 30A breaker is in residential use where (in the U.S.) a 20A receptacle would be the largest single-phase outlet allowed under many local codes and, I'm pretty sure, the NEC. Moreover, the 30A breaker creates hazard, because the rest of the circuit (especially the receptacle) isn't rated for 30A. That's a potential fire hazard.
A grounding rod bonded to the service panel is required by code and, often, code requires two rods. If there's no rod, you should contact an electrician or, if you're a renter, your landlord.