<Esc>:w<CR>
I could just have it escape instead without saving.
If I hadn’t chose jj it would have been ff, which is also always under an index finger. I do wish I’d been clued into the idea when I started with Vim instead of two years later.
I either put CapsLock where Escape sits or use both shifts simultaneously (one cancels it) but even then I almost never use it. The rare times I need to type a lot of uppercase together is generally code in vim and visual selection + gU does the job.
The point of my comment was not to shill for a particular solution though but for the vim community to acknowledge the problem publicly instead of it being some insider knowledge you discover in a random internet comment six months into fighting vim (if you haven't dropped out yet)
I do jk as I always find a roll easier on the fingers than a double-tap jj or kk. You could also use space provided you aren't using one of those distros that bases its identity on the spacebar.