This is a big question. The answer is it depends. However, based on how you asked the question it sounds like you have not done much programming, if any.
Everyone has a different learning technique. Some learn from books, others from being instructed, watching videos, or pulling other's code apart, or simply taking a situation or problem and try to solve it by referencing/Googling.
Javascript:
For YouTube, I like Mosh's style:
JavaScript Series - YouTube[
^]. Mosh also has paid courses:
Code with Mosh[
^]
Html/CSS:
Kevin Powell is also very good, another personal favourite:
@KevinPowell - YouTube[
^]. Kevin also has paid courses:
Courses[
^]
Hope this helps!
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