What should I do after finishing a beginner meditation course?

Deepen rather than restart. The most common gap after a first course is knowing the basics without knowing what to practise next, and the answer is usually to take one technique further rather than collect new ones. In StillMind a Techniques course adapts to where you are, so the same course type that introduced a technique at beginner level refines it at intermediate and integrates it at advanced, moving toward noting, working with difficulty and choiceless awareness. A Loving-kindness or Self-discovery course is the other direction, opening ground a beginner course does not cover.