if a user is not in the sudoers login as root and edit your /etc/sudoers. look for the line that starts with “root ALL =…” copy and paste it below with root replaced with your username

edit: nevermind I missed the part that said disabled the root account. that’s weird not sure why you wouldn’t be able to access root unless maybe a typo during password creation

I remember my first job where I saw someone using actual math like trig and calculus to perform flight calculations and I freaked out not remembering any of that from school. I later found out that person was like part of the “A team” group of developers who would be handed task like that and fortunately I was assessed at a lower level