Yeah, this will definitely get you started. You should be able to create this in any basic text editor; Notepad will do the job if you're on Windows, but Notepad++ is even better once you've gotten some experience.
@pink2ds didn't provide any styling in her example; if you want to make web pages fancier you'll need CSS (Cascading Style Sheets) as well as HTML.
Mozilla has more detailed tutorials if you're interested.
Also, if you're on a desktop and go to websites that aren't mainly JavaScript apps, right-clicking and selecting "View Source" will let you see the markup used to build pages.
Maybe you also can just use index.gmi on this particular site, and write in gemtext instead of HTML.
@starbreaker, please use she/her for me.♥