Deciding between uni and course?

Hi all, I’m a mature student, I was a near mis candidate, so firm choice of biomedical genetics was declined unfortunately, I was set on attending this university as I felt/it does have more accreditation in the sense of research (Russel group) than my insurance uni choice for biochemistry, I’m now considering switching course choice all together for a chemistry at firm choice university, as I thought it would give me a good foundation to come back to biological studies but I think I’ll miss biology too much to keep me motivated, should I stick to my insurance choice as I could be thinking irrationally into changing courses although I don’t mind chemistry, or consider a year out how do I decide? Does the university matter or is it the course? Which would be the best for me to follow research into genetics? thankyou for reading ☺️