Nice to have you on the forum Kim.
A good place to start is with the care sheet.
When you do get a garter you'll be well prepared.
The first Canadian breeder(forum member) that comes to mind is HazAnga(Nick)
I'll put a link to his page in case you want to contact him.

Garter Snake Care Sheet - Caresheets
Garter Snake Forum - View Profile: HazAnga