By no means an exhaustive list... inspired by a young teen who wanted to have a "coven":
What tradition will your coven operate within and what are your qualifications for teaching it?
If it is a tradition of your own making, what are your qualifications for making it? What have you studied to arrive at that point?
What leadership experience do you have?
How old are you, and how long have you been practicing?
Do you have any references (former students, teachers, etc.) that potential coven members can have access to?
How do people know you have a safe and sane environment for them to practice within?
How safe is your meeting area? Do you own your own house or land or do you rent? If you rent, or live with parents, do you have permission to hold religious meetings on the property?