Is there an official redhat tutorial for linux such as how to add my account to sudo?

I've installed redhat the other week but I am very rusty on linux and was wondering if Redhat provides a free offical tutorial on linux just to get newbies started? Such as, to add my account to sudo correctly. I can google and get answers from various site, but it's not redhat and I don't know if there's anything particular about redhat, thus I ask.

With sudo, I plan on installing veracrypt.