I plan to dig in deeper, but this looks like a great introduction to building websites.
I teach a one semester high school Web Design class and currently use a mixture of lessons from these two for learning the basics of making pages by hand with HTML and CSS:
I have to say, for me, https://internetingishard.netlify.app has uncomfortably pale body text.
It is #5d6063 on an #fdfdfe background where I sampled it.
(The background is `linear-gradient(0deg,#f9fafb 0,#fff)`.)
The serif typeface looks too thin on a low-res display.
I think that if you want to lower the contrast of a dark-on-light page—well, first, don't lower it too much [1],
but second, it is better to make the background darker than the text lighter.
Avoid thin faded text.
I teach a one semester high school Web Design class and currently use a mixture of lessons from these two for learning the basics of making pages by hand with HTML and CSS:
https://internetingishard.netlify.app/
https://www.washington.edu/accesscomputing/webd2/student/ind...
This looks very promising and could supplant or at the very least supplement those.