I have had good results with Kdenlive. If you're a professional, you might choose something else, but this is a question about noob-friendly video editing software
Kdenlive is likely your best bet. Even if u have issues here and there, in the long term you'll be happy you stuck with it. It has very active development and is shaping up to be the most used foss video editor.
Youtube is full of Kdenlive tutorials. Within 1 hour of learning you'll know the basics use of it. It is easy if you're willing to start with tutorials since it is different from other video editing softwares.
Do not use openshot. Really bad bugs that will make it impossible to export your project and make all your time working with it wasted. Use kdenlive instead
I used to use Cinelerra back in the day. It's a non-linear editor like Premiere. If I could figure it out with YouTube more than a decade ago, it shouldn't be too hard.
I don't know, but I wouldn't recommend OpenShot because it just gets really laggy when adjusting the timeline, and it lacks certain workflow features that you'd just expect mature video editing software to have (like the ability to move or delete keyframes)
I started with OpenShot Video Editor for it's ease of use in being able to cut parts of a clip out. But it was very slow, and now I'd reccommend Kdenlive.
I found kdenlive terrible. DaVinci Resolve is much better, but it’s closed source and has some limitations in terms of hardware encoding support (nvidia only).
DaVinci is a great piece of software, but is VERY limited on Linux. The lack of mp4 support in the free version is enough to not recommend it for a newbie.