i'm currently on 12th,i'm planning to do medicine @ dundee,uk next year ,i would like to know the procedure for admission and where to start

i'm currently doing my 12th in tamil nadu state board ,and i'm planning to do medicine in university of dundee next year i would like to know the exams i need to write and where to apply and the procedures ,and i want to know about UCAS and where to apply for it and how to apply for it.