How to be proficient in one language?

Question

What can I do to improve my coding skills after completing one course in SoloLearn?
Suggestions regarding any websites where one can
1. strengthen their concepts?
2. practice more?

Answer 1

You could surely make some codes.
Read more books and find out those useful resources.
Memorize what you've learnt, always when you're sitting alone in a corner....

For resources/books :
https://www.sololearn.com/Discuss/204501/?ref=app

You can practice right there in the code playground...enjoy :]

Answer 2

Write some code)
Think up something interesting and make it in program
The best way to learn something is to do it