When learning to code:

Don't memorize things,
Understand concepts
Sounds simple? Here's why you should think about it more than once:
When you're getting started, it looks much simpler to memorize HTML tags, names of useful methods, etc.
It doesn't make much sense

You can waste a lot of time focusing on the wrong things.
What you really should do is to ask WHY.
Why is the most important question in our life.
Whenever you watch a tutorial or read an educational book, ask yourself this question often.
It helps to expose the missing parts

And only when you understand what you don't know, you can get the bigger picture of the topic, your knowledge, and your educational process.