How much practice

To learn how to program, you have to program. The theory should be studied quite metered, depending on capacity, and each nuance should be repeatedly worked through.

Solve problems on the same topic until it is deposited inside.

It's a good idea to practice for 5-6 hours every day, 7 days a week.

If you practice hours 3 and 4 times a week, you will go slower. If you practice less than 2 hours 2 times a week, you can quickly get stuck at one level and not develop. Or you can develop. But slowly.

Many people say that there is no sense in practicing for less than 2 hours. Because the first hour a person just remembers what has passed, pulls from memory.

And the second hour already goes on. And it makes no sense to study less than once a week, and for someone - less than two or even three times a week.

What direction did you choose?

Learning to program interfaces in HTML5 (JavaScript) is easier than making applications for Android and iOS, for example. There are a lot of areas in programming, they require a different amount of knowledge, a few different skills. So that time will also require different.

One thing I know for sure, in order to create a really quality product like https://binerals.com/blog/make-a-new-instagram-or-how-to-build-app-like-instagram you need to spend a lot of hours to learn.