Some additional tips:
Do a test recording to make sure sound and lighting are ok (ambient noise will come across much louder than it seems, because our brains can block it out).
Use good file management at the editing phase. If you’re making videos that have a combination of different files including audio, images, video clips etc, have a folder for each project to help keep things together. It feels easier at the time to dump things into your “Pictures” “Downloads” folder etc, but it costs more time in the long run hunting for the things when you want to use them.
A Google search for “royalty free music” can find lots of background music. There’s heaps of freely available audio, image and footage out there.