To learn original coding visit:

                          https://www.w3schools.com/
                          
to make your projects executable download:

VisualStudio - https://code.visualstudio.com/Download - (for HTML CSS JS)
Intellij - https://www.jetbrains.com/idea/download/#section=windows - (Java Kotlin)
Appcode - https://www.jetbrains.com/objc/ - (C Cplusplus swift)