How to let me shift my bike myself

Hi there! How do I use TrainerDay so that I can shift my bike myself? There are times I want to do a “spin class” workout off YouTube, and just follow along with the video, shifting my own bike (but I want the app to capture watts, cadence and milage). Is this possible? What mode do I put the app in?

Thanks!
Steph

Just start with quick start and click the slope button, you can press up arrow or down to increase resistance but you don’t need to use gears to control.it.