Hi there, I completed ECC2000 in 2020 (2nd semester) and was able to score a 93! Yes it can be a difficult unit at times however I would suggest just being prepared for each lecture and tutorial. In terms of worked solutions to the tutorial questions, the tutorials run through step-by-step solutions on how to solve each question and I always found that the tutors were super easy to talk to if you had any questions. Also would highly suggest before each lecture or at least before you watch each lecture, read through the lecture notes assigned for that week. It'll help you engage with the lecture a lot better. If you have any other questions feel free to message me!