A: Yes, you can.
1. Once you setup a sub-domain you can either use the sub-domain itself or embed to your website.
2. You can add your leaders as moderators for them to have their own sessions
3. You can use the Community feature to offer membership packages. If you're collecting payment through GoBrunch, there's a small fee and you can see on the Tiers description, but the fee only applies if you collect payments using the platform.