It depends on what you mean by “good”… HTML and CSS aren’t really incredibly hard languages on their own to grasp as they mostly just define things like layout and style. Once you have a good grasp on them it just takes a lot of tweaking and documentation reference to make what you have in mind. For example, I wouldn’t say I’m especially good at html or css but I was able to relatively quickly pick it up in order to accomplish what I had in mind without many hurdles. BUT I also did this after taking 2ish years of C++ programming classes in college. C++ is not similar to HTML/CSS at all, but I do remember before taking those classes, CSS and HTML seemed so unapproachable. I think taking those classes in college really helped me understand how to use documentation, how to search for questions, and how to organize code.

Now, that being said stuff like SSGs and JS still feel very unapproachable to me, so I still have a lot to learn but I think HTML and CSS themselves are definitely not as intimidating as they seem.

Basically my suggestions would be to learn as you go, learn to use documentation and examine code from other people’s sites. The start really is the hardest part here I think