Installing WP MultiSite on Server running WHMCS

Hello WPMU folks! Here’s the end goal: https://premium.wpmudev.org/blog/web-hosting-design-business-wordpress-multisite/

And here’s what I’ve done so far:

Bought a VPS w/ WHMCS from GoDaddy. Punched myself in the face a few times trying to get it set up. Bought a WPMU membership. Re-read the above article 40 more times.

Using FileZilla, logged into server and found a TON of folders, directories, and stuff that made me punch myself in the face a few more times for getting in over my head.

Now, somewhere there has to be a tutorial regarding the what needs to be done <really bold>BETWEEN</really, really bold> the two steps!

Am I supposed to start with an initial install of WP MultiSite into one of these folders? If so, which one: public_html, www, one of the other folders? I would ponder a guess that this is really an important step. So, I want to make sure I get it right the first time.

So what are the steps between where I’m at, and where I need to be?

Thanks for the help! -Brad