Welcome to Aquarium Advice Ash! We hope you enjoy it.
Betta's are really wonderful fish, and you will quickly realize that. But the problem is you can't really keep a single German Blue Ram in a 10 gallon. The bare minimum they need would be 20 gallons. A 10 gallon just won't be enough for these fish. I would suggest looking in some shoaling fish, or schooling fish. Just don't forget to research fish before you get them to be 100% sure of the combination. Another great website would be: aqadvisor.com
Another option would be to put the betta in the 10 gallon and add some fish in there with him
Good Luck Ash