I installed ubuntu 20.04 on my dell notebook and would like help.

My doubts are in relation to Dell packages, how can I install on ubuntu 20.04.
Assistance and backup software. how do i add the official dell repository in this new version? to have dell drivers instead of generic drivers? and what command on the terminal do I see to see if the device drivers are up to date?

I did not install ubuntu 20.04 in OEM mode. due to not having access to that version for my device.