Now's not the time for you to create a quiz. (And that's okay!)
Hey, you've got a lot on your plate. A quiz requires a dedicated marketing strategy to nurture the leads coming into your system.
Plus, quizzes don't work for all business models. You need to have a product or service you can sell (or at least warm up!) over email.
So consider this your permission slip to take "make a quiz" off your to-do list for now.
But what you might consider is productizing your client work. Imagine taking something you've built for a client, packaging it up, and setting up a sales funnel that will allow you to make sales in your sleep.