I'm a video professional locked into the Adobe suite for a variety of reasons, so I don't have
experience with editing software outside of Adobe products. However, I recognize a lot of names on this list as reputable:
https://en.wikipedia.org/wiki/List_of_video_editing_software
Like most things, this is a craft where the tools can make or break the joy of doing the work. Keep that in mind, but otherwise don't stress too much about the software if you're just getting started. You can always switch later to a better tool if you're enjoying the process.
Then again, you came here for advice so here's my extra tips :)
Remember that usually software is free because it's limited, or stuffed full of advertisements. Mobile apps especially. That might be just fine for your purposes, I don't know. For me, if I'm putting in the time to learn a new tool, I want the possibility of growth to be available in the future if possible.
In my experience, good editing software looks complex, but you just need to learn the basics and ignore all the extra buttons when you're getting started. If you're ok with something bigger than your needs, Blender has an editing feature summarized here:
https://youtu.be/Zoselojp3KQ . Blender is a robust program that's free for good reasons (because its founder has an interesting business/money
philosophy, not because it's a cheap tool.)
If you can do the following, the tool is fine:
-Make precise edits (you should be able to move forward/backwards one frame at a time to place a cut right where you want it.)
-Import and export all of the formats you need
-No limits to video duration, filesize, etc.
-No watermarks or alterations to your video imposed by the software
-Ability to close your current projects and reopen them a few days later without fear of the software being offline, expired, etc. (persistent software on your
local machine, not in the cloud, is ideal.)
Other people with more experience using today's free / "user friendly" tools can probably suggest more nightmares to avoid.
Editing is basically just putting one shot in front of the next. Like most things, the biggest part of this journey is going to be developing your craft, your instincts, your taste. Justyn is absolutely right: make stuff, share the work, enjoy the feedback, and you'll get better and better. When you start editing a lot, you'll also start noticing how other stuff is edited. You'll notice things that look bad, sound bad, feel "off," and eventually you'll start to know why and maybe how to fix it.
Best of luck!