Hello, Johanna!
I use Clipchamp for most of my video editing. It is user-friendly, and Microsoft is good at keeping their documentation updated (to learn it - https://www.microsoft.com/en-us/microsoft-365/clipchamp?msockid=095de6db73716eee2497f0d6724b6f53). I would agree with Donna that it would be easiest to use as you are already using Microsoft.
Another tool that I have used is Adobe Express. There are paid and free versions. I have found the free version is sufficient, but it has a bit of a learning curve.