If you haven’t done so already, I would suggest completing this learning path:  https://academy.mendix.com/link/path/31/Become-a-Rapid-Developer
If you have completed this learning path, the high level steps you’ll need to take are:
	- create a domain model that reflects the data structure your wireframes and process flows from Lucidchart imply
 
	- create pages that enable administration of your app as well as operation of the app by the users
 
	- lastly, create microflows to implement the logic in your process flows.
 
Hope that helps you get started,
Mike