Hi,
Just like you I had exactly the same question about a year ago. Best thing to do is download the trial version and get a feel for how the whole Android development works. It's not enough to just take your code and convert it, you have to learn some of the basics of mobile devices and their operational cycles. There are plenty of examples here and the community here is absolutely brilliant. They will definitly help you to get started but, I would strongly suggest looking through the forum posts and see what examples/help already exists that might help you convert your VB code.
Hope this helps.
Good luck.