Yeah it's like enrolling in a regular class. You pick the day (usually T, W, Thurs ) and time of your choice (between 10 to 7pm PST). But instead of going to school you log in online and attend a zoom class of only a maximum of 12 students. Most students pick classes after 6 pm and late classes tend to get full and closed in minutes of web registration.
I find it better actually. With only 12 students per class, the instructor can devote more attention to each student. I had to come in class prepared too (which one should be, because they call out everyone and I couldn't hide haha