A complete course focused on real estate modeling and taught by Professor Linneman at the Wharton School

https://courses.getrefm.com/courses/refai/

Many different models and instructions available. They also offer a certification course.

https://www.adventuresincre.com/

Justin also has courses on Udemy, but this is his direct course site. A great resource for beginners.

https://breakintocre.com/about/