Kerrie, how fabulous that you found the right book at the right time. And don't worry that you didn't find it earlier. You might not have been ready for that. The universe does funny things. Often when you're ready for something, it just turns up in your life almost out of thin air. And doing exercises is a great way to get the creative juices flowing in a smaller structured framework, so there's no fear of "what if I get stuck and can't finish the story".
Maybe if you've got time you could tell us what some of the exercises were, or if anyone else has an exercise they find helpful, they could share it too.