As for editing, I know a multifunctional program for video editing with a simple and clear interface and a rich set of tools for video processing. In my opinion, https://www.movavi.com/learning-portal/vlog-ideas-for-beginners.html is one of the best usability. Even if you don't have any editing experience, you'll get great results. You can change the soundtrack too: cut unwanted stuff, change volume, playback speed, suppress noise, play it back, use appear/disappear.