Hello InsyirahRazali,
Thank you for posting on Apple Support Communities.
If you are paying for a Family Sharing Apple Music plan, then your siblings should be using their own account instead of yours to make things easier. They need to sign in with their own Apple ID to Apple Music in order for everyone to have their own Apple Music profile and library.
In order to set that up though, you need to set up Family Sharing first in your Apple ID settings. Click on the following resource to learn how to set that up: Set up Family Sharing & What is Family Sharing?
Once you have set it up you can add Apple Music as one of the shared features for your family. This way everyone has their own account in Apple Music with their own library, playlists, etc.
Good luck and take care.