Welcome Dennis,
You are in the right place and have also discovered a little know secret. "Garter Snakes are great". Little know to the rest of the world and to many other snake keepers.
I currently keep 6 different species of garter snakes.
If you ask me which I recommend, well. That's an easy call.
T.radix(Plains Garter Snake) Hands down for me. Many of mine are like big old dogs. Very docile and interactive.
Glad you are with us.
Here's a link to the care sheet which is a great read since you are just getting into garters. Any of your questions not answered in the care sheet, feel free to post them to the forum.
Garter Snake Care Sheet - Caresheets