It will last for 20 hours before resetting. You can create as many instances as you need, meaning you can therefore train at your own pace. Please don’t feel that you must complete everything in 20 hours!
Each video Practical takes you through a dashboard concept. Watch the video, then repeat what you were just shown. It's recommended that you do each in turn, but if you’re a rebel at heart you can dip in and out of each practical.