2 links to help you choose a good typo
Choosing a typo for your website or your mobile application is always a pain. Even more when you are not a designer. And I’m far away of beeing one!
Here are two links and a book that I appreciated a lot when I was looking for fonts for my last application.
http://www.smashingmagazine.com/2012/05/21/how-to-choose-the-right-face-for-a-beautiful-body/
http://informationarchitects.net/blog/responsive-typography-the-basics/
And if you want to go deeper in the discovery of typography, you should definitely read this book :
http://www.amazon.fr/Just-My-Type-About-Fonts/dp/1846683025/
Those resources will never make you a professional typographist, but they’re still a good read.