Add something like this to your .nanorc:
bind F1 help main
bind F2 curpos main
bind ^c copy main
bind ^x cut main
bind ^v paste main
bind ^z undo main
bind ^y redo main
bind ^f whereis main
bind F3 findnext main
bind ^h replace main
bind ^s writeout main
bind ^q exit main
There, “familiar” shortcuts in nano.
RTFM for more nice things you can put in your .nanorc:
man nanorc