Well, so anybody who goes into the same sh** know how to solve it…
I followed this ideas:
Many of the file modifications couldn´t be made for permission and read-only mount points and things like that…chat gpt taught me how to solve this things (that´s becoming freaking good…)
Also increased the amount o memory available to my CPU graphics from 64mb and 128mb in BIOS, as someone suggested that could be the issue.
One of this things apparently solved the problem. Booting normally now
WAs also getting this message in POST, but that vanished after all that…
dev/root: can’t open blockdev
VFS: cannot open root device “ZFS=boot-pool/ROOT/24.04.02”
Please append a correct “root=“ boot option