Create Mobile Application for existing web application

Question

Hello Sir,

 

Actually i am new in mobile application development.

 

I have to develop a mobile application(Android) for an existing web application in Asp.Net(C#). But i am getting "How" & "From Where" i should to start for this ?

 

Which is better XAMARIN or CORODOVA to create cross platfrom mobile application with Visual Studio?

 

Should work with web services or create web API. If i should have to go with web services then how it will work for me? or if should to go with web Api then how to build web API for existing web application and How to use it for mobile application?

 

 

Please please guide me. It will be very helpful for me.

 

Thanks & Regards

Rahul Lakshakar