College Honors Program

I recently received my course recommendations for FA19, and there was something that surprised me: I was invited to join Thurgood Marshall College Honors (TMC 20 Honors Seminar). I discovered I was eligible due to my above par SAT score and HS GPA. I do not really have an idea of how honors seminars look like, or how it works. What is the average class size, what is the course load, etc. Could anyone who has an idea of how this honors program works please give me more info? There’s not much info online. I am interested in participating.
Thx!