Driveway and garage daily driver hobby/enthusiast here. I’ve used several brands of clay bars and Griot’s Garage Brilliant Finish Synthetic Clay.
The Synthetic is a much nicer experience for a number of reasons.
Whatever you choose, don’t overthink it. Keep it simple. There is plenty of information on the forum and great products at the store. Try to enjoy the process and you will be very happy with the final results.