How to install official AMDGPU linux driver on Debian 11?

[Markos <markos@c2o.pro.br>]

Hi,

Please, could someone suggest a tutorial (for a basic user) on how to 
install the driver for the graphics card for a laptop Lenovo IdeaPad 
S145 with AMD Ryzen™ 5 3500U and AMD Radeon RX Vega 8 running Debian 11 
(Bullseye).

I found a more complete tutorial just for Stretch and Buster:

https://wiki.debian.org/AMDGPUDriverOnStretchAndBuster2

What are the possible risks of problems using these AMD drivers?

Does using these AMD drivers make much difference in performance?

Thank you,

Markos