I understand completely. I’ve been using the free Windows Live Essentials Movie Maker for years. It’s so great and easy to use. I use the touchpad on my I7 laptop while sitting in my recliner. Easy! I’ve made HD videos on it that are shown in museums!
HOWEVER, I recently bought a new I7 with a beautiful 4K screen. Tried to install the same free program, but Microsoft has discontinued the program. It’s not available anymore so, like you, I’m on the hunt.