Hello, and welcome. Just tossing in my two cents about Snakes.
If you decide to feed minnows, guppies, or goldfish, make sure that you have a vitamin powder with vitamin B1 listed because the fish above can cause B1 deficiency which is harmful and ultimately fatal to your new snake. B1 is also called Thiamin. Something I do with my garters as soon as they're big enough is to switch them to pinkies or fuzzies. The mice give the snake a more complete diet than the fish alone will, and you dont have to worry about Thiamin deficiency.