If you're not satisfied within the first week of BBfB, you can unsubscribe from the course and receive your money back.
The course starts on Sunday 5 March; so, any time before Friday 10 March 2023 17.00 CET, you can apply for a refund.
No hard feelings, no questions asked. (Though, I'd love to hear feedback on how I could have improved your experience.)
All you need to do is email at MindYourOwnRevisions[at]gmail.com