It depends what you want to! These are the best languages to start with in different fields (in my opinion):
Data Science: Python
Web Development: HTML
Mobile Development: Swift for iOS and I think JS for Android (not entirely sure)
Do your own research too, decide what you’re interested in!
I had your problem at first too.
In my opinion and experience, for beginners, it's better to learn python at first. It has a very simple language than the other platforms. It's very simple and fast to learn. But only if you want to progress.
Ok, first of all python is easy but, java c++ JS, i found those languages pretty simmilar, and they all easy and effective, from the other side: python is unique language that no language remind her writing.
So, if you now just know python and now want to start learning other languages, it will be little bit diffuclt from know just java and then start learning other languages.
So, i will suggest you not to start with python and start with c++ or java.