Custom App Coding

[CKonash]

Hello, 

I am interested in creating a custom App to use as an "Opener" file on an iOS device that I can deploy to some fire departments.  They are using filemaker Go already but I would love to replace the filemaker icon and have it automatically find their host file on the server and log them in, vs opening the "recent" files in Filemaker Go and having them click on that.  

I downloaded X-Code and applied for the developer subscription and also signed up for the filemaker developer annual subscription and attempted to play around with it enough to get things to compile correctly but I think it maybe outside of my expertise range.  

Is there anyone that is familiar with this process and can guide me into the do's/don'ts of doing it?  Also once I have the final version how do I go about deploying it to just a few users?  

Is there anyone here that does this as a service?  

Thanks

Chris Konash