Apple Music isn't the best streaming music service — it's just the least annoying::Competitors like Spotify and YouTube Music may be your first choice for music on Android, but you might want to reconsider
I switched to Android a few months ago and expected to want to switch away from Apple Music, but their Android app is excellent. Plus they have lossless quality. Oh, and you can upload your own music to their cloud for streaming anywhere.
I don't think Spotify supports uploading your own music files. It can indeed show local files, but i'm not aware of a upload mechanism such as YouTube Music has.