Web Development languages are really useful to learn, they are also really popular cause many services now are used on web browsers. The main three languages is HTML, CSS and JavaScript. When learning them, it will be a bit different from general coding languages as HTML and CSS are used on web designs while JavaScript will be more similar in terms of logic.
Other than those, Java is a nice language to learn and would be easier coming from python. Same goes for C++ which is very common in many applications.