Manual quiz submission

I am new to Velo, and would like to get some advice (as detailed as possible, please) I would like to build a simple quiz, where the user is ranking each question from 1 to 5. The questions are coming from a CMS, using a repeater. In that same repeater, I would like to show a ranking element, where the user will enter their answer. The desired behavior: There should be a submit button, that will be enabled only if all answers were filled in. Upon submission I would like to capture the question number (part of the CMS) and the answer and store it somewhere, ideally triggering an event I could handle. After submission, the code should calculate the rank and select the proper response from another collection in the CMS, display it to the user, and send them the result. I could not use any of the quiz in the App market, either because of their price or because they do not have the required logic to calculate the answer. Any help would be highly appreciated!