Where do I start with preparing for medical interviews?

It's normal to feel intimidated with medical interview prep! Start with giving yourself a high 5 for getting an interview, or a high 5 for starting to prepare early. There are a few sections you can broadly split your preparation into - (a) examples and reflections of your work experience/volunteering/extra-curriculars/work, (b) medical theory (e.g. the structure of the NHS, medical training, clinical governance, ethics), and (c) interview technique and practicing. Once the first two are underway, practice is crucial to ensure you feel confident in answering different types of questions and in your body language/manner. The different universities you've applied to may vary in style of interview and length of questions, so it's important to cater your practice to those.