New member. Info needed.

[reptile65]

Hi everyone. I just joined this forum. My dad found a baby snake at work today and brought it home. I really wasn't planning on keeping it, but after seeing it, I thought it was too small to release because I was afraid it wouldn't last long. I need help with identifying this little snake. From the research I've done, I believe it is a baby western terrestrial garter snake. I have attached a few pictures.

Also, I have no idea what to feed it because it is so tiny. I'm not sure if it is even big enough to eat a pinky mouse. What should I try feeding it and how often should it be eating? Any other info is greatly appreciated. Thanks!