When a Telerik Platform subscription with more than one seats is purchased, the holder of the purchase becomes the Account Owner
of the license and the members taking the other seats - a Member of his account. Due to the nature (lessons, steps, projects, permissions to create a project) of the Interactive Tutorials, they are only shown to the Account Owner.
That is why I'd suggest that you create a separate, personal Platform account in order to make use of the Interactive Tutorials. Each new account is started with Telerik Platform Business edition and after a 30-day period converted to a Starter (Free) edition. Even when the trial period expired, you are able to open, restart and follow any new interactive tutorials.
Note that if the above seems plausible to you, you might need to switch your accounts between the one that is an owner (your personal) and between this in which you are added as a licensed user. The whole procedure is explained here.
Also, for your convenience, here is a list of the completed tutorial if you need to check your code against the completed apps.
You can clone the apps directly in your preferred AppBuilder client by creating a new AppBuilder Hybrid project and selecting Clone from the options list. Then, enter the address of the GitHub repository.
Here are the links for cloning them directly under your Telerik Platform account. Note that if a project with the same name already exists, you will be prompted about this. In such case, please refer to the approach above.
Let me know if further questions arise.