Since you are already working with HTML/CSS I would definitely start with Javascript, like others have said. From there, I would start by looking at what your

Since you are already working with HTML/CSS I would definitely start with Javascript, like others have said. From there, I would start by looking at what your goals are first. Why do you want to learn? Do you want to build something for yourself, or others? Is it just for fun or do you eventually want to get a programming job. For example if you want a good job in my hometown, you end up working in Government. So if someone were to ask me what the best language is for them to get a job, I'd say look at the .NET framework (which is what the majority of our Government uses). Personally if I just had to throw out a language, I'd say Ruby.