Normally I do love the cute little "good, simple, free -- pick two" type setups but here I am not sure good + simple exists anywhere.
Equally windows is lagging a bit behind Linux these days for the free higher end video editing world. Please do avoid windows movie maker and its ilk. People will tell you to find a timeline based editor and I can agree with that, short version is a timeline sees you take multiple clips, overlay things and give something priority, and then chop them around so as to make a whole video. It ultimately works better than trying to put one video after the other and maybe cut some bits out, though you can still happily do that with a timeline based editor.
My preferred editor is avisynth
http://avisynth.nl/index.php/Main_Page
It is based around writing scripts but is incredibly powerful and with a lot of very nice abilities as a result. Here is a thread I made a while back handling some things
http://gbatemp.net/threads/be-a-great-video-maker-and-replicate-this-video-effect.360509/
For basic chop bits out, do some subtitles and generally make things do well in a GUI, as well as some serious footage cleanup options, then I would suggest avidemux
http://fixounet.free.fr/avidemux/
Something with a bit of complexity, and with it a lot of nice features
Lightworks
https://www.lwks.com/
Not something I get on with the best for video but many like it is blender
https://www.blender.org/manual/de/editors/sequencer/introduction.html
For Linux, which is available all for free if you want it, then I would suggest kdenlive
https://kdenlive.org/
That said I looked at
https://filmora.wondershare.com/video-editor/free-linux-video-editor.html as part of this little list exercise and it does well.