Can you tell me if there is any interest on the wallet?
If you mean do we earn interest on our BitBeans? then the answer is yes we do however you will need a few hundred thousand BitBeans before you start earning rewards. You could start with a small amount however it might take days before you earn any rewards so that is why I recommend at least 100k BitBeans to get started and if you can maybe even 500k as that should get you a few sprouts per week so around 3k BitBeans in interest a week if you leave the wallet unlocked and open for a long period of time.
When you buy BITB, send the BITB directly to your wallet Don't you need to do anything else? It doesn't seem like POS interest. What would you like to set up?