Theres no one programming language that you should stick with. there will be a point in time when concepts become more important than the programing language that you choose. First find one programming language that you like and learn as much as you can from it. You can broaden the languages you know later. For now stick with one until you've gotten pretty good with it.
A good way to study programming is to learn algorithms (steps to do something). You can write the same algorithm in different codes so if you know the algorithm, you can easily "translate it into another computer language.
For me, I started out learning C++. This is a difficult language to learn for a beginner though. I would recommend C# or Java first to you. The best way to learn is by hands on experience. so when you pick a language to learn, watch tutorials or read a book and always try the code out on your computer