Should I learn Python, C#,JavaScript altogether?

Answer 1

They are different languages for different porpuses.

Depends on what you would like to do.

If web development, go for Javascript.

If game development with Unity engine, go for C#.

If artificial intelligence development, go for Python.

Those links may be helpful for you.

https://www.sololearn.com/Discuss/2536061/?ref=app
https://www.sololearn.com/Discuss/864254/?ref=app