Hello,
It seems like you have quite a bit of “struggling” yet before you really grasp Bubble concepts, but if you put in the time to learn and read, you will manage. Keep reading and trying new things until you understand the information presented. Bubble is a powerful tool, but there is still a moderate learning curve in the beginning.
Nevertheless, I am going to present some information that will hopefully provide you with enough direction and encouragement to keep trying.
First, there are two topics. Auto binding/data privacy and app design with respect to user roles. As for the former, don’t concern yourself with those topics, later on you can figure out how to implement them in your app. Starting out, don’t use auto binding and remove all privacy restrictions on all data types (including the default that are set on user), they will just cause confusion.
As for the latter, I will explain now. First, you should plan to include a reference to “User” across any data type that is specific to a user in your application. It might not be need across all data types as some data types might be details of another or some data types might apply to any user.
For example, a company data type might have a reference to multiple addresses using an address data type. The address data type does not need a user reference so long as the company data type has the user reference (e.g. User → Company → Addresses).
As for creating the flow on page load that checks for role I have provided a visual example and an editor link below.
What you see happening is a Navigation → Go to page… (Action) on the Manager’s page using the event General-> Page is Loaded. When this event is triggered on the Manager’s page it is going to navigate the user to the index page (destination). However, this only runs when the current users role doesn’t contain “Manager” or “Admin”. The logic is inverted in this example, but if you had a page with an element that you only wanted a manager to see you could use similar logic inverted (e.g. when role contains “Manager” → show element, otherwise the element remains hidden).
The role is created as an option set and attached to the datatype as shown below:
The editor link to see it in action is here (you can review the administrator page for another example). Double-trouble-bubble | Bubble Editor
Note: In case you haven’t made it this far yet in Bubble, All users can be easily impersonated so that you can see the different roles in action by using the “run-as -->” link in the user list (shown below).