iATKOS Inside: Guys, please tell me. I currently have sonoma and need to upgrade to sequoia and save the files. Do I understand correctly, I install the update via system settings and then do the patch via oclp? Or is it not that easy!?))

Guys, please tell me. I currently have sonoma and need to upgrade to sequoia and save the files. Do I understand correctly, I install the update via system settings and then do the patch via oclp? Or is it not that easy!?))