Apple music family plan and subscription

Hi, question about family sharing a subscription to apple music. Im 17 living away from family but my assigned guardian on family sharing pays for apple music if i get removed from family sharing and family on ios etc. Do i lose all my library on apple music (not talking about the downloads but the library or archive that i just add music to). Or when i buy an apple music subscription can i access my library again or do i need to note all the songs i have right now incase i lose my library even after getting new subscription really curious