Moved to GA from PA less than 2 years ago. License is easy. You have to go to the DMV office, but that's not a big deal. No tests required, just your money. You can chose from a shorter license term (maybe 4 years...I forget), or a longer one which is like 6 or 7 years.
Registering the car here also isn't that big of a deal. They changed the tax laws a few years ago, so it's not the pain it apparently once was. Still requires a trip to the DMV, but not rocket science.
If you're moving to ATL, be ready for the traffic. I will say that I don't find it particularly any worse than in Philly, where I spent the first 40+ years of my life, but there's just more of it. From here to Disney "should" be a 7 hour ride. We rarely make it in less than 8, because of traffic here in ATL...and that's with me trying to...ahem...make up time...once we clear traffic.