People above already said the right thing about DaVinci Resolve, I'll just add from personal experience. I also started with CapCut back in the day, thought I'd quickly edit something and be done with it, but when I needed proper color correction and 4K work, I realized it's a tool for something completely different. On your Ryzen 5 with GTX 1660 DaVinci Resolve will be pretty comfortable - I know people who work with similar hardware and manage just fine. CapCut is definitely more convenient interface-wise for beginners, effects apply fast there, but for serious 4K editing it'll constantly frustrate you.
From practice: DaVinci Resolve has a full-fledged Fusion for special effects, an excellent Color Page for grading, and support for a ton of formats. Yeah, the interface is chunkier than CapCut, steeper learning curve, but it's worth it. If you're planning to grow your channel and develop further, better get used to professional software right away. You can use CapCut for quick edits on your phone between other stuff, but do your main editing in Resolve. My advice: download both, spend a week or two on DaVinci Resolve and you'll see the difference is pretty significant.