do sololearn app tought you every thing about any programming langue or we shoud search for also other ways

Answer 1

Sololearn only teaches you how to programme , but it didn't teach you how to build a software etc. Go search for more ways, I recommend experimenting on your own. But remember that a search engine will always be there for you when you are in doubt.

Answer 2

Search other ways.

Sololearn is usefull for starting with coding in a language, but just finishing a course won't make you an expert. You should experiment on your own which is the most important thing to learning coding. You can use websites with programming problems like Codeforces or anything similar.
Read other people's code. That will make you learn a lot about the language.