It’s okay to let your ideas sit. If they’re meant to manifest into more, they will. Maybe not soon, but one day. Michael wrote Earth Song in 1988 and it didn’t end on an album until 1995. That’s 7 years of an idea sitting until it manifested into something ready for the world. But if you want to try to write them now, Pinterest is great for inspiration like the other user said. Music playlists that remind you of the story helps, too!!