anyways, my advice is to just keep using it, no matter what! funny thing, the first couple of days i could not stop typing "nano <file>" due to muscle memory so i finally aliased it to "nvim" and also created "pico" as a link to nano's binary, just in case. well, it took maybe 3 days for me to find myself in nano and trying to control it with vim commands. that was the day i removed nano from my systems and made nvim my editor of choice!
what's helped me the most on advanced features is every once in a while learn a few new key presses. i reference these [1] two [2] cheat sheets every so often and i pick 2 or 3 commands and write them on a note pad in front of me. i reference the notepad a few times until i retain the command, which is pretty hard sometimes, but so worth it.