Is there a way to change shortcuts in midnight commander?

Okiedokie... lets see

$ man-section mc | head -n20
mc (1)
--
 Name
 Usage
 Description
 Options
 Overview
 Mouse support
 Keys
 Redefine hotkey bindings

8th section... is that possible? Lets look

man mc (scroll,scroll,scroll)

Redefine hotkey bindings
    Hotkey bindings may be read from external file (keymap-file).  A keymap-
    file is searched on the following algorithm  (to the first one found):

     1) command line option -K <keymap> or --keymap=<keymap>
     2) Environment variable MC_KEYMAP
     3) Parameter keymap in section [Midnight-Commander] of config file.
     4) File ~/.config/mc/mc.keymap
     5) File /etc/mc/mc.keymap
     6) File /usr/share/mc/mc.keymap

Bingo!

cp /etc/mc/mc.keymap ~/.config/mc/

Now edit the key mappings as you like and save ~/.config/mc/mc.keymap when done

For more info, read the Keys (man mc) section and the three sections following that.

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$ cat /home/jaroslav/bin/man-sections 
#!/bin/sh
MANPAGER=cat man $@ | grep -E '^^[[1m[A-Z]{3,}'