I use kakoune + tmux very happily, and between the two of them I’ve spent maybe two hours on config in the last eight years. There’s a point of rapidly diminishing returns once you get past changing the control prefix in tmux to something that doesn’t cause carpal tunnel.

I've used vim to the stage that I not only know how to exit it, its muscle memory... And I still prefer nano. Its just better imo.

That puts you vastly ahead of most people who encounter vim.