what would an enterprise application look like?

[Eric Downey]

I'm learning ionic/angular/node.js and so have decided to create a PWA for my miniature gaming group.  When you complete a game we submit the results to our league and you score points depending on how you do and move up or down a leader board.  Right now I have a wordpress website with a web page that we fill in and it sends an email to the league manager.  The form contains around 15 selects and a few inputs.  All of the selects are populated, obviously.  My initial component.ts file is, in my opinion, becoming ungainly with all of the code needed to create the validations, populate the selects, etc.  I stopped work on it until I could get some feedback from the professional community as to how an enterprise app would be written.  All I find on the iterweb so far are fairly simple todo examples or how to do things but not a lot about how to write a fairly large or complex application in Angular.  I would love to hear people's opinions on how they would approach a large scale project or even/especially a large/complex form.