I already bought a few parts of Jason Allen's 'Music Theory Comprehensive Complete' course (Udemy), a while back, thinking that the best way to proceed would be to start right at the beginning and move slowly. That hasn't happened. I guess I need a much quicker pay-off; enough to kindle the fires of interest and motivate to go deeper, at which point I think Jason's course will feel a little more approachable.
Curious to know, however, if it felt like it was complete, in and of itself i.e If you had no access to any further resources (Other than re-watching Guy's course, over and over), do you feel that you have a solid enough foundation?
I have the Jason Allen courses as well (he has quite a few variations, such as Music Theory Comprehensive Complete!, Music Theory for Electronic Music COMPLETE, Composition & Film Scoring 1 & 2, Music Theory for Electronic Musicians and Music Composition), which I haven't really got into yet, but they do look ver comprehensive. I have been mainly using Music Composition with the Piano: Ultimate Keyboard Theory Music Composition and Practicing & Arranging with the Piano by Jack Vaughan which are much more about technique than theory, but do include theory. I find these the best and worked well with the Guy Michelmore Theory lessons.
There is also the videos by lessons by Jonathan Peters that cover theory but also go into orchestration and harmony. For practical composing there are lots of lessons by Mikael Baggström. I also have 2 courses on orchestating for strings and woodwinds Karleen Heong but I am yet to try them out.
I have have hundreds of youtube tutorials. At times it feels like there is a bit too much out there when it comes to composition. I find Skillshare pretty good as it has most of these courses included and you can often sign up for 40% off for the year subscription (I think mine cost just £50)