Studying others is a natural way to learn, making learning easy and fun. Our advice to anyone wanting to learn HTML is to get out there on the World Wide Web with a suitable browser and see for yourself what looks good, what's effective, what works for you. Examine others' HTML source files and ponder the possibilities. Mimicry is how many of the current webmasters have learned the language. Imitation can take you only so far, though.
Examples can be both good and bad.
Learning by example will help you talk the talk, but not walk the walk. To become truly conversant, you must learn how to use the language appropriately in many different situations. You could learn that by example, if you live long enough. Remember, too, that computer-based languages are more explicit than human languages. You've got to get the HTML syntax correct, or it won't work.