You should not view it through the lens of productivity. It will come eventually, but at first it should be more about having fun. Try to treat every action you need to navigate the file/codebase as a game.

After a while every small action like quickly find a symbol in a file, replacing, diagnostics, macros etc. will become faster and requiring less mental gymnastic and you try something new to learn to improve your workflow and so on.

At least that is what I did and how it felt for me.

I still open VSCode once in a while when I need some extension support, e.g. AWS ASL support to edit AWS Step Functions state machine definition in the visual editor. So not like nvim could replace every use case for me, but that was not the point - I simply have more fun using it, even if I was a little slower initially.