Hi @Sam Hohn
If your goal is simply to share documents with 7 people, you do not need a 10,000-member group. You can create a Team and add the 7 members directly, provided that your organization allows Team creation. If you are unable to create a Team, it may be due to a permission restriction configured by your Microsoft 365 administrator.
You may want to check with your administrator to verify whether your account has permission to create Teams within your tenant. Once a Team has been created, you can create a folder for sharing documents by following these steps:
Open Microsoft Teams.
Create a new Team channel > Add members who need access.

Open the General channel (no need to create an additional channel unless desired).
Go to the Shared tab.
Select New > Folder > Create.

Upload your documents into the folder. Files stored in a channel are backed by SharePoint and are accessible to team members with permission.
I hope this helps. If you need any further assistance, please don't hesitate to reach out.