Hi there,
I am expert Android developer with eight years of experience and create your app easily! No problem at all.
First of all I would offer you an app, which opens your website within included WebView. It is most quick solution and would not be expensive.
I can send you a demo quickly, what is the url of your website?
I will be happy to work with you and very excited to hear from you soon!
With best regards,
Sargis