I will advice you to work on understanding the concept of your study; which may be why you are having difficulty working on the tutorial. Your lecturer plays a role too. It is hard to find a science communicator who is able to explain things in layman term. I have difficulty absorbing chunks of boring texts or speech from the lecturer.
You may want to look up edx.org or coursera for a similar course, they have some of the best lecturers who are able to communicate complex materials in a layman term.
Thank you. If you need anymore advice, you can always hit me up with a PM.