You should pick the A2-B1 combined course (halfgevorderd) if you can comfortably understand and read at B1 level, even if your speaking lags. This level skips the expensive A0-A2 basics you already know from German, and it focuses on exactly the gap between passive understanding and active production. The speaking challenge is real, but it is manageable with the right approach.

The key tradeoff is that your comprehension will outpace your speaking for a while, which is normal for German speakers. In an A2-B1 class, you will get structured speaking practice that forces you to produce Dutch, not just understand it. The alternative, starting at A0-A2, would waste time and money on grammar and vocabulary you already grasp intuitively from German, like word order patterns and cognates. However, if your speaking is so weak that you cannot form basic sentences at all, consider a brief self-study phase before the course: practice speaking Dutch for 15 minutes daily using apps or language exchange, then reassess.

To evaluate your options, look for courses that explicitly mention "halfgevorderd" or "from A2 to B1" and ask about the class format. A good course will include ample speaking time, not just listening and reading. You can also ask the provider for a placement test or a trial lesson to confirm the level fits. If the A2-B1 course still feels too advanced for your speaking, ask if they offer a shorter, cheaper refresher module for A2 speaking before joining the main class.

Concrete next steps: 1) Contact the course provider and describe your situation exactly as you did here. Ask if they have experience with German speakers. 2) Take a free online placement test for Dutch (many language schools offer them) to confirm your reading and listening level. 3) Start speaking Dutch now, even imperfectly, to build confidence before the course begins. 4) If budget is tight, consider a community college or online course that offers the A2-B1 level at lower cost. The most important thing is to challenge your speaking without boring you with basics you already know.