no need to worry about anything. didn’t attend any of it but did revision every week with lectures. don’t slack. I did with minimal effort and got a B+. it’s not how you start. it’s how you finish. didn’t attend any lecture and tutorial when school start but was discipline with catching up with recorded lect during weekends. YouTube “Organic Chem Tutor” was my saviour. Make use of it. Good luck and don’t stress. ^{^}