Economics/Acc&Finance/Business

I have a lot of questions about changing universities and courses, as well as the process of transferring…
I’m currently almost halfway enrolled in Biomedical Science at the University of Reading as the classes didn’t start yet, but I might need to change uni due to uncertainties about the maintenance loan since it’s expensive to travel there. I’m thinking about switching to a program in Economics, Finance, or Business in different university but since I’m coming from a science background, I’m not sure what to expect. Could you provide some insights into what it’s like to study these subjects? Specifically, is the coursework heavily based on mathematics?
Can someone also lmk process of transferring uni around oct if it’s too late… ik lots of q and stuff going on im like really lost rn:’)