Thanks for reaching out on our forum 
I don't necessarily know of any tutorials with this specific use case, but we're happy to chat with you about your app in office hours, if that would be helpful
In addition to planning the UI, I recommend considering how your end users will access the app. Some questions to consider are: how will your end users log in to their Retool accounts, what pricing plan best suits your use case, what permissions will your users need if you pay for granular permissions on the Business or Enterprise plan, etc