What should I learn next

Question

I have gain the overview of the languages taught by Sololearn. I would like advice

Answer 1

Go for W3Schools once. It has great resources

For challenges visit hackerrank or sanfoundary that will be basically a practice for u

Answer 2

hey...
u did the lessons but did you learn?
If you are interested in theory, I propose to learn the most common algorithms and data structures.
or begin to apply what u learned and do the code coaches.