There's a billion different options in the AR market and trying to figure them all out before purchasing a first AR will just drive you to a SCAR.
The Ruger is a fine choice and will serve you very well. They're a great company who stand behind their work.
I've been in the AR game for years and you'll hear lots of companies get bashed but then they're a hero to someone else. Just find an AR configured how you like and it'll most certainly work for you.
Just don't go cheap on the optics. There's nothing like seeing a $1000 rifle with $50 optics on it. If you're going to get a red dot, go with a baseline EoTech or AimPoint Pro.