Hello Miguel,
Thanks for using Apple Support Communities.
If you'd like to create a family Apple Music account, then you will need to start a Family Sharing group:
With a Family membership to Apple Music, families of up to six people can enjoy all of the benefits of Apple Music, each with their own library.
To participate in a Family membership, select Family when you choose your membership plan. Then, set up Family Sharing on your iOS device or Mac and invite members to join. You can also change to a Family Membership after you join.
About Apple Music - Apple Support
Set up Family Sharing - Apple Support
As far as your iTunes Match subscription, it will still be active and functioning with your Apple ID, but the songs you have with iTunes Match which were added from outside of the iTunes Store will not be shared with Family Sharing. You can learn more about what you can share using Family Sharing in the article below.
Which purchased content can I share using Family Sharing - Apple Support
Take care,
Alex H.