What do you use/learn to make apps or games( the best or advisable language)

Answer 1

Unreal/C++:
www.unrealengine.com
https://www.sololearn.com/Course/CPlusPlus/

Unity/C#:
www.unity3d.com
https://www.sololearn.com/Course/CSharp/

Android/Java:
https://developer.android.com/studio/index.html
https://www.sololearn.com/Course/Java/

Answer 2

C# or C++. But C# is easier and it's similar to Java, so i will say C#