-Yes editing is a key part of my job. Although it's plenty of simple editing and almost no fancy effects and so on. I need to cut video edits fast, modify audio, crop and scale video.
-Shotcut loads instantly and runs natively on linux. That's the biggest selling point for me. It's extremely simple and has a clean UI. Also it handles .ts mpeg containers easily. Some apps, even premiere have issues with that format.
-I tried Openshot, Kdenlive and a couple of other apps. ShotCut was lighter and simpler.
Check your local LTE bands and then check gsmarena to make sure G52 supports them.