First, allow me to say Welcome to Reef2Reef!
You'll find lots of help here. Red Sea makes pretty good hardware and has a very good reputation in the hobby. As for the nano tank being a good tank to start with, IMHO it's OK. A lot of reefers will say that small tanks are harder to keep than bigger tanks. Bigger tanks are a little easier to keep stable water parameters than small tanks where a small mistake in a small water supply can be a bigger issue.
But IMHO, if you are prepared to pay attention to detail and are NOT looking for a 'set it up and forget it' tank, you can do it. BTW, there is no saltwater system that is maintenance free... or even low maintenance as far as I'm concerned. I've had a 425g system (2 tanks and a big sump/refugium) and now I have a 40g cube and a 16g stand alone holding tank with a HOB (Hang On Back) filter and a small in tank skimmer. Don't over stock it and it's fine.
Good luck and ask questions. Getting started in this hobby can be quite a challenge.