The coach profile should be enough for you to be confident to book with a particular coach but if you want to ask a question you can message the coach on PlayBook. When you book you have a field for session goals and athlete context so you can be as detailed as you like in that section for the coach to be well prepared to personalise the session to your level, experience and goals. If you want to have a detailed conversation before the session then you can book an online mentoring session with the coach.