The programming language you decide to learn first really comes down to what you want to achieve with it. Having said that, Python is probably the best language to start with. Python is not only a great programming language because it has a very simple syntax that is easy to understand but also it is very popular nowadays in areas such as web development, data science, and automation. In case you are a web designer, you might consider learning JavaScript in addition to it. What is more, Python is very easy to learn, so it will give you an almost instant grasp of programming concepts.
