Seconded, I am not at all knowledgable about video editing but had to do some stuff which was beyond the capabilities of iMovie and was impressed by Resolve. It

Seconded, I am not at all knowledgable about video editing but had to do some stuff which was beyond the capabilities of iMovie and was impressed by Resolve. It’s fairly complex and the UI is pretty non-standard (true of many “creative”/media applications) but fairly logical and there’s loads of help online. Plus it’s free if you don’t need larger than 4K export!