Update Raspberry Pi Bootloader and Firmware

First step:

Image your SDCard with Raspberry Pi Imager, select latest Raspberry Pi OS.

Once booted up open a terminal and run:
sudo apt update
sudo apt full-upgrade
sudo rpi-update
sudo reboot

Log back in and do:
sudo rpi-eeprom-update -d -a
sudo rebootNow open up config:
sudo raspi-config

Go to Advanced Options

Select Boot ROM Version and press Enter

Use the latest version then select Ok

Reset if asked and reboot.

Now you will see a boot order menu.This also leads you to USB booting etc 😉 Enable SSH via Raspberry Pi Configuration if you want to work on your Pi remotely via SSH.
This can be done via running raspi-config (sudo raspi-config) in a terminal and going to Interfacing Options and enabling SSH, or via the GUI app.
default username is: pi

Fin.