What apps or websites can you suggest for one to study advanced courses after learning the basics from sololearn?

Question

SoloLearn is undoubtedly an amazing app for programming. However, it is no news that it deals with only the basics; please suggest other apps that I can use after SoloLearn.
https://www.sololearn.com/discuss/490646/?ref=app

Answer 1

Do a web search to find this information yourself or ask for one topic such as Java GUI. There are thousands of choices to answer your question as asked.