Why do u use sololearn...Do u think it improves ur skills?
Use of Sololearn
It improves my practice, so it improves my skills and my consciousness of them, by giving me the opportunity to help people, directly or not, as I was helped to self learn programmation during years, reading books and finding lot of answers in many web sites/forums ^^
The best way to learn is through teaching others. This is a saying that I like and is quite accurate. Even though Sololearn teaches the basics, you could go through comments from the courses or go on the forums to help people out. If Sololearn is not enough for you, you could find some other forum on the internet to try and help others, all the while solidifying your own basics.