Curious about the whole "don't want to publish to other sites." Licensing worrying you?
Anyway, hechelion's answer is the simplest. Go with it if you have the pdf created. The thing with comics is that a lot of the industry ones are published as pdfs, so there's no real usage for an HTML-conversion or separate player to go with them, when most of the providers would rather go "hey, the buyer has something they like for pdfs, let's let them use that." That's not withstanding specialized readers like Amazon or Hoopla that can zoom in on specific panels, but honestly if you're not looking into programming then that might be too much of a pain unless you want to meticulously comb through each page and define the panel size/location in some reference document, and even then that's too much effort for one comic.
Anyway, I'll go ahead and tell you how to replicate it from scratch, if for whatever reason hechelion's answer fails you.
No experience? No problem. Every page in Temmie's comic is using a very basic template. Each page has a centered image element for the comic page, a back/forward button with href set to the next page number (except page1.html, which links index.html for the title page), and a primitive ToC below. You know the basics of making a web page that can display an image and use an image for a link? You have the means to replicate that functionality, just copypaste it several dozen times and change each one to host a different page as well as link the previous/next.
