I want to learn oop out of sololearn what channal or website or book you know to learn oop ?

Answer 1

there is many websites learn oop like udacity and codecademy and ...many ,and about channal bucky and Hussain alrubaiy
note:keep in your mind that sololearn have many ways for learning oop and very simple way to understand what happenings in programming

Answer 2

https://www.quora.com/

Answer 3

https://www.quora.com/Which-are-the-best-websites-to-practice-and-learn-object-oriented-in-java-or-C++

Answer 4

www.geeksforgeeks.com
quora(specially for clearing your doubts)
www.khanacademy.com
and u could even yourself search on google and don't use only 1 source for learning because not every source covers everything(even this app) and 1 more thing don't pay online for learning because most of them are useless.
Hope this helps you😁