How can I share a form I created with other members of my team so that it is available to them in their accounts as well as just being able to collabo

It is possible to share forms with other accounts by adding the account as a sub-user:

https://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User

You can share access to view and/or edit either the forms, submission data or both.