Follow the instructions here: [SOLVED] Black screen after install
Same as steps 1-3 here: https://itsfoss.com/fix-ubuntu-freezing/
and let us know if that works.
Then try #2 in the earlier post: Garbled monitor at boot until I close laptop lid and reopen it
Update - I saw some information about the Discrete Graphics Mode in BIOS possibly being related to graphics issues. Can you try toggling your settings for that, then using the sudo ubuntu-drivers autoinstall and then seeing if you can boot without having to resort to the lid closing? Your drivers are the issue and the nouveau doesn’t seem like the long-term solution here, otherwise you wouldn’t have to do the lid closing just to get it to work.
These sites show different issues but are all graphics related:
and