Indeed! There is a vast bibliography but starting with a music-school theory book is often really daunting... so searching for something different I found this

Indeed! There is a vast bibliography but starting with a music-school theory book is often really daunting... so searching for something different I found this series from Michael Hewitt [1], there are 3 books, one for theory, one for harmony and one for composition. Halfway through reading the first book I decided I needed to get better at inputting music to my computer, so I started to learn Reaper (which is a bit like "the emacs of DAWs" :-). https://www.hooktheory.com/ https://www.hooktheory.com/ is also a great practical resource, focusing on numeral analysis of popular music, and the their composition tool is fantastic! I have a backburner of other resources that I want to eventually cover but I figured that was as good a starting point as any. 1: https://www.amazon.com/kindle-dbs/entity/author/B001I7U4SM https://www.amazon.com/kindle-dbs/entity/author/B001I7U4SM