Problems with installing on Rb941-2nd-TC

Hi.Can anyone confirm that the instructions on this page are correct?
I made a script, launched it, then I turned on the router, but nothing happens, it just loads into stock.
Thanks for attention.

USER=seqularise #CHANGE THIS
ifconfig enp3s0 up
dnsmasq -i enp3s0 --dhcp-range=, \
--dhcp-boot=openwrt-ar71xx-mikrotik-rb-nor-flash-16M-initramfs-kernel.bin \
--enable-tftp --tftp-root=/home/$USER/mikrotik/ -d -u $USER -p0 -K --log-dhcp --bootp-dynamic

Some time ago I was installing OpenWRT on rb941-2nd-TC - successfully. There is one step that is not described on OpenWRT wiki. In ROS you have to set booting from dhcp. Below is a part of description from OpenWRT forum

  1. Open webfig (web config), and change sections mentioned.
    System → Routerboard → Settings → Boot device: Try ethernet once then NAND
    System → Routerboard → Settings → Boot protocol: DHCP
    System → Routerboard → Settings → Force Backup Booter: Checked (if supported by your routerboard - !IMPORTANT) - it seemes that last setting is the key))
  2. Reboot router from the webfig (IMPORTANT!), plug-in the cable from pc to wan port, and boot openwrt via tftp (it's better to do it all as quick as possible).

dnsmasq-dhcp: DHCP packet received on enp3s0 which has no address