Hello friends... Happy new year!! I'm stuck since last year!!

o)
I'm trying to update my MacPro 5.1, with Nvidia GT 710 2GB, this weekend. After spend a lot of time with "a required firmware could not be installed". I believe the AAAAAAAAAAAAACAAAAAAA== to AAAAAAAAAAAAAAAAAAAAA== did the trick.. (I don't know if I'm right... Am I? -- I did the Monterey install to a HDD, migrate all the data from a SSD, then trying -with no sucess- install Monterey to the SSD, and getting the firmware issue again!)
After that, I'm stuck at SIP disable, to after that patch the wifi/bt and Nvidia card. (I don't mind to buy a better PCI board to wifi/bt, by the way...)
So, reboot to Recovery, did the csrutil disable, without the authenticated-root (I can't do it... not abled).
Then, the status is:
Tried to read a lot about it, but I'm new to the mac world, and a little lost here...
some good soul can take a look to my config.plist and gimme some direction?
I would love to know how to:
1) fix the "a firmware update..." issue, to be able to install the Monterey at my SSD.
2) How to do the SIP disable
3) Understand the best way to patch my Nvidia (I believe, after the SIP disable, I can do
this process, Am I right (by the way, I'm using this exact GPU)?