> changing default shortcuts from CMD to CTRL. Is swapping the positions enough?

I strongly recommend not to do this.

I did it and it was a nightmare: some of mac's hotkeys are like linux hotkeys but reversing Meta & Ctrl, but not all of them. I adjusted the most egregious hotkeys, but there were always more. This went on for around a month. In the end, it was impossible for me to get used to the differences: my muscle memory would betray me many times over the day, and it wasn't getting better.

Then I deicded to just reset everything back to my distro's defaults. It was painful for a couple days. I made a few mistakes in the next week... and then it all got in muscle memory. I can even switch from working on a mac to working on linux without issues now.