Just pitching in another welcome to the new students. This is a very challenging course, but you do have help. When you are stuck on exercises or even tests, send a note to Glenda and she will forward it to your instructor. Don't be shy about that. They want you to succeed and you cannot do that if you don't understand. So ask questions. I have found that the instructors give very practical feedback, even on test questions where they don't say "here is the correct answer" but they can suggest that you look here or there or give examples and other guidance to help you figure it out.
And that written work where when you miss a question on the test you have to write the error, correction and analyze why you missed it and how now you understand it, that is one of the best learning tools. It takes time, but certainly brings into focus the problem.
Anyway, welcome and come visit us on the forum.
Donna G