DaVinci is definitely a professional software, but it does require a professional-level computer to run, meaning it simply does not install on a simpler machine.
I try to use only open source software, and I truly believe this is as relevant a topic for humankind as it is permaculture or avoiding huge corporations products.
Of course, the most used video editors are commercial, and you'll have a hard time searching professional people and companies working with open source software. On the other hand, the open source community is usually friendly and helpful - like-minded, I'd say.
Some (free) open source video editors:
Shotcut
https://shotcut.org/
Openshot
https://www.openshot.org/
Flowblade
https://jliljebl.github.io/flowblade
Kdenlive
https://kdenlive.org/
I haven't tried neither Shotcut nor Openshot. They seem to be simple and effective.
I've tried Flowblade (it's linux-only), and liked it, but I use Kdenlive.
Editing video is probably the most demanding stuff you can do in your computer. If you're willing to use an average-spec computer to edit video, you'll need to use proxies - a way to replace the original video with low resolution versions. The final video will be rendered with your original clips, so there'll be no quality loss.
Both Flowblade and Kdenlive work with proxies - I don't know about the former two.
Flowblade states it was developed with stability in mind. This is the biggest issue you will have, regardless the editor you choose: the software crashing. I've been using Kdenlive for a few years, and have no problems, but I use Linux (I'm guessing you use Windows). Many people complain of Kdenlive crashes in Windows, even in Linux. The ideal would be having a dedicated computer only for editing, but it may not be a realistic option for most of us.
So, my suggestion is to install one or some of the editors mentioned, add one or two clips, generate proxies and apply some effects. Render it and see if it works. If you need help, have a look at the forums - they may be somewhat buried, like kdenlive's:
https://forum.kde.org/viewforum.php?f=263
Of course, there are many other communities for these softwares (aside the 'official' ones), for instance on reddit and facebook.
And if you want me to go into details, I'd be glad to help.
