Oxford Med Interview Prep Qs

Hi all,
I am a y13 aspiring medical student and I decided to try and give Oxford a shot: I have 3 A*s (in chem, bio and history) predicted, an A* in EPQ, 99999999988 (+A in FSMQ) at GCSE and a 2490 B1 UCAT, so I feel pretty confident in my chances of getting an interview (although I guess you can never be sure). I want to start my preparation over this half term but I’m struggling a bit to prioritize what is most important. Of course there are the more obvious things like reading my EPQ again and having confidence discussing everything on my personal statement, but when it comes to learning and revising a-level content and practicing the type of thinking that is needed during the interview I get a bit stuck. What sections of my chemistry and biology a-level should I focus on covering? My advisor at school said to avoid plant parts of biology (which makes sense) but also to revise the organic parts of chemistry (right now I’m struggling to discriminate between the two sides as a lot of the organic stuff relies on basic principles from the inorganic side). Also, what else apart from mock interviews can I do to practice being put outside of my comfort zone on the spot? Any advice would be much appreciated xx thanks in advance!