How to manage UNIGE?

Hi, I'm going to UNIGE next year as an undergrad doing biomed or biology. However, my french sucks (it's been 2 years since I got the B2 certificate and I haven't spoken french ever since, but this is my only option due to my permit). On the website I see the duration is 3 years, and there are TONS of content in year 1. I've heard you don't have to take all of them in 1 year? And that you can also apply for exchange in the UK or US later on in undergrad? Is this true? How can I manage? I'm currently doing the IB diploma in the german region of switzerland and I'm taking german instead of french, and I don't have time to learn french, not even in the summer since I need to prepare for another competition.

Also, how is the student life there? Are they friendly towards people like me that barely speaks french? Are there lots of chances to interact with the professors? If I interact with them in english, what will they think?