I'm facing the exact same problem, haha. I'm basically two weeks behind, because it took me a while to understand most of week 2's content, and now I'm trying to understand week 3's content for my quiz tomorrow. FINS1613 is hard, ugh. I don't think that Finance will suit me for my major... but I'm still going to go ahead and attempt this course anyway.
Now... just looking at the tutorial answers aren't enough. Try attempting all of the tutorial questions yourself, looking back at the lecture notes for the basic formulas to guide you along. After you finish attempting each question, check the tutorial answers and you should have a better grasp of how the answers were derived. If you don't, highlight the question and bring your questions + your work for the questions to your tutorial, bring them to your tutor (ask your tutor if you can meet with them outside of the tutorial, I need to try doing this), or bring them to the lecturer during consultation hours.
I've noticed that a lot of FINS1613 is based on different formulas. Writing down all of the formulas on a sheet of paper would definitely help you with this course. Ever since I started doing this, FINS1613 has gotten a tad bit easier to understand. The PowerPoints are rather messy and confusing, so writing the proper formulas down on a sheet of paper will, in my opinion, definitely help you.
Or you can ask a second/third/fourth year Finance major for help. I have a friend who's taking Finance as their major and they're in their second year. I sometimes ask him for help.
Edit: Urgh. Just attempted the FINS1613 quiz and it went pretty badly. I'm pretty sure I failed the quiz...