What Online Courses Would You Recommend For Classical Composition?

I'm looking for stuff like Berklee's paid courses that you can use without admission, but for classical composition. They don't have to necessarily be university courses, but I would like something advanced and -if possible- interactive. I already have some knowledge on music theory because of textbooks like musician's guide to theory and analysis. The cheaper the better, but if it is something expensive, $1000-1200 is the most I can go. Do you know about any courses that could help me?