As far as the rhythmic aspect is concerned, traditional horn etudes use mostly simple (duple and triple) meter and rhythms. Contemporary etudes may use more complex rhythms or meter, but often aperiodically or irregularly. What’s missing? Groove!
Download this useful list of sound painting gestures.
Udemy.com is an online tutorial services offering courses in many, many areas, from software development to business to how-to’s with popular software programs to various things in the arts, including…. music. There are tutorials in many instruments, but also music theory, audio production, composition, songwriting, and more. There is a range of prices, but in general, the tutorials seem to be a bargain.
Interesting lists of good stuff, e.g. 30 Tips for College Students, 50 Small Ways to Improv Your Life, 50 Things to Do When Bored, 12 Websites Where You Can Download Free Stuff, etc. etc.