Learning HTML was necessary to blog in the 1990s when I started in 1998

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https://en.wikipedia.org/wiki/Blog

 The emergence and growth of blogs in the late 1990s coincided with the advent of web publishing tools that facilitated the posting of content by non-technical users who did not have much experience with HTML or computer programming. Previously, knowledge of such technologies as HTML and File Transfer Protocol had been required to publish content on the Web, and early Web users therefore tended to be hackers and computer enthusiasts. In the 2010s, the majority are interactive Web 2.0 websites, allowing visitors to leave online comments, and it is this interactivity that distinguishes them from other static websites.^[2] In that sense, blogging can be seen as a form of social networking service. Indeed, bloggers not only produce content to post on their blogs but also often build social relations with their readers and other bloggers.^[3] Blog owners or authors often moderate and filter online comments to remove hate speech or other offensive content. There are also high-readership blogs which do not allow comments. 

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I began to teach myself HTML (Hyper Text Markup Language) which the Internet mostly functions on regarding content in 1995.

Of course I had been programming computers since 1966 when I first started college and majored in Computer Data Processing and Computer programming then at Glendale College. I first worked for the Glendale Board of Education in their data processing department on an IBM 1620 mainframe and computer periferals like Key punch and sorting machines and reproducers and the like and Accounting machines eventually. All these machines were then built by IBM  (The International Business Machines Corporation) then. I wanted to work for IBM then at age 20 but realized they only wanted (then) people with a Bachelor's degree in mathematics and I wasn't interested in doing that). Math is okay but it's not my favorite thing in life. However, I do love Logic and am very good at Logic and reasoning like my father who was Valedictorian of his Senior High School Class in 1934.

Since Logic and Reasoning are the most important qualities you need for getting into Computers (at least it was in 1966) this is the direction I wanted to go in developing robotics and logic circuits and logic based programming and flow charting which I was really and still am really good at. 

However, then I found out that we were 50 to 75 years away from what I was interested in and then this caused me to lose interest in working in computers because then it all became very tedious when I couldn't be as creative as I wanted to be then because technology wasn't advanced enough for me yet. So, by the time I was 21 or 22 I went in different directions in my life away from working with computer corporations and stuff like this. Also, I found I didn't like working indoors or in offices either. So, I was intelligent enough to do more stuff that I liked because I wasn't married yet which I did at age 26. So, all this worked out quite well for me in moving me towards owning businesses instead of working for other people eventually by my late 20s. I really love owning my own businesses and being in charge of everything including my time in my life 24 hours a day.

However, I bought my first home computer a TRS-80 from Radio Shack in 1978 for 800 dollars which could be programmed with the BASIC language. So, I eventually taught all my kids to program in Basic Language so they could create their own games on the computer and I assisted them in creating games in Basic for them to play then. in the late 1970s and 1980s.

Then I bought my first IBM Clone AT Computer in 1987 and a Color Epsom Printer for around 2500 dollars from Silicon Valley because I lived on the coast nearby then. Then we used MS DOS and then Windows 95 eventually to as we progressed through Pentium and other PC computers. I didn't covert to Apple computers and Macbook Pro Laptops until the mid 2000s when I got tired of my PCs Crashing all the time. Apple computers don't crash and if they do you need to take them to get repaired or replaced.

I took apart a Yahoo opening page with Windows 95 by making a copy of the page and then playing with the variables to see what they all did. So, I never took a course in HTML simply because I already knew at least 3 computer languages already. And to some degree if you know one computer language it's pretty easy to learn another one once you realize how they all work and how the technology works and does what it does electronically.

So, what I know about HTML was all self taught just by experimenting first with a Yahoo.com opening page that I copied to my Windows 95 computer then around 1995.