Do I need any experience to start a meditation course?

None at all. Your experience level shapes the course rather than gating it. A beginner gets sessions of around 5 to 15 minutes that introduce a technique one piece at a time, with guidance that stays generous the whole way through. Someone further along gets 15 to 30 minute sessions and a course that refines the practice they already have rather than starting from the definition. All four course types are open at every level.