I found two great courses there. This is great info all compact into two courses:

https://www.udemy.com/acoustics-101-...losure-design/
https://www.udemy.com/acoustics-201-...-measurements/

This forum is a good source of info if you have 100 hours to sit and search and read through 90% bs and 10% good info.

I found the loudspeaker measurement course to be pretty good. A lot of us use REW but don't really understand what we're measuring so this breaks the ice on that subject.