Is there a .vimrc that already maps all the standard notepad++ keybindings in one go ?

You may find someone who has one, but I just did the ones I found myself missing as I encountered them.

I tried someone's all-in-one .vimrc, but it broke too many community recipes while rebinding a bunch of shortcuts that weren't in my muscle memory anyway.

I kept adjusting my .vimrc as my muscle memory transitioned. So having less to fiddle also made it easier for me to keep my .vimrc tuned to my muscle memory.

For example, I was using / instead of Ctrl+F because I liked it better within a month or two.

There are better editors to learn if your goal is to not learn vi.

In vi, search is not only used for searching, but also for navigation. Demoting search from an easy-to-reach single key to a difficult-to-press chorded key combination breaks one of vi's core philosophies, natural editing flow, and will significantly reduce your enjoyment and efficiency using the editor.