I’m not hugely experienced when it comes to this, but I can try to answer any questions you have that that doesn’t answer.
However, you can use Windows Movie Maker as well, which is probably on your computer already. If not, and you use windows, you should be able to download it for free.
Windows Movie Maker isn’t a great program, but you can make music videos with it, and I think it’s a good way to experiment with what making videos is like before you invest in an expensive program.