Well besides build a audio based project.Would reading the docs on web audio API be of use to you?
I made extensive use of the Web Audio API for my drum machine project (https://bbdrummachine.surge.sh/). I usually found myself on this page a lot:
Another good page is:
There’s also a free O’Reilly book:
The main reason I needed to use the Web Audio API was for the precision timing. Since I added a sequencer I needed to make sure that the sounds played at the exact time that they were supposed to.