The entire class, you just do one experiment with in a group of 3-4 students. Most of the quarter you're setting up circuitry and the last few weeks you collect and analyze data.
Generally at that point you start running a program and check in with it in a few hours/the next day to see if the data you're getting makes any sense.
There's a written midterm and an oral exam/practical, which isn't super hard but might be intimidating.
The final report had a very low page cutoff for my group and we really struggled to fit what we needed to say in the limit. Our data was kinda awful and we didn't have room to explain why or what we would have done with our analysis if our data was more like it was supposed to be, which led to a pretty bad grade on it.
You'll be needing to reach out to the prof and TA a lot since generally a lot of stuff breaks in the lab that you won't be able to fix yourself. Most of the lab work is done in your own time so this can require a lot of communication.