how do I accept an invite to family sharing?

Hello Haz-1234,

Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you have questions about accepting a family sharing invitation. To start, check out this article about Family Sharing, and how to accept invitations under the section titled "Join a family group": Set up Family Sharing

The related article at the top f the page also has excellent information about sharing iCloud+ storage and how it works.

We hope this helps.

Cheers!