The paper Adult learning theories: Implications for learning and teaching in medical education (Taylor & Hamdy, 2013) gives a nice overview of adult teaching and learning theories and is a good place to start. Reading and understanding this before you start your education placement will be helpful.
The GROW Model (Mindtools, 2020) is a great framework to help you develop coaching and communication skills.
Read the information in the 'Frequently Asked Questions' tab for more information of what to expect on your placement.