Have you tried Youtube library? It's got tons of royalty free music and you can find basically any genre and/or mood. I relatively recently started working on a hobby project about ambient music and many of the song I use I got from Youtube library. I also used songs from https://www.free-stock-music.com/. And in the same sense, there are many stock images royalty free as well. Man! technology has certainly made everything more accessible from music to images to wallpapers to basically anything, like my niece accessing this trigonometry tutor and getting help almost instantaneously.
Bear in mind is my first music project, and basically every step of the way I took it was all new to me..... on the other hand I feel kinda sorta indirectly proud of it. 😎😆
Let me know your thoughts 😄