Small steps.
In general like flying, editing has so much to ‘take in’ so start with clipping out unnecessary parts of footage, sharp control errors etc, add some nice transitions, opening text etc.
I use some music from the DJI GO4 editor, Fly probably had this too, or you can add some good tunes from YouTube when uploading too.
Later you can start finding other suitable music online from various free or subscription sites.
If you have storage space, save all original footage as later when you’re more experienced, you can revisit these and see just how much better you can edit with some learning behind you.