I suggest DaVinci Resolve, free version. I'ts pretty straight forward, you don't need to use all advanced settings. Import video in "Media" tab, add to timeline in "Edit" tab, then if you need to do basic adjustments like temperature etc use the "Color" tab, then choose "Deliver" tab for export.

Does anyone successfully use iMovie to edit clips?  Or is there another editor that's not as complicated as Premier or FCP?  Doesn't seem Ineed all those bells and whistles.

Thank you.

Premiere Pro can be simplified tremendously in the UI.  You can check this out if you wish. https://helpx.adobe.com/premiere-pro/using/workspaces.html

If you have a Creative Cloud subscription, another possible option is Premiere Rush, though it won't have some of the options and export capabilities of Premiere Pro.