I have successfully completed html course. Now, which course should I start next?

Answer 1

1-HTML,HTML5
2-CSS,CSS3
3-JavaScript, jQuery
4-PHP
5-MySQL
...

Answer 2

SoloLearn's HTML course sets you somewhere between beginner and advanced. Read more & practice to reach the required level.

Answer 3

Now you pretty much know the structure of a webpage you should learn how to style it with CSS.