I just wanted to say your puppy is absolutely adorable. I actually have a 4 year old jack russell (my first puppy ever) at my parent's house, and now I have my little yorkie Luigi living with me at my apartment. They are both great dogs in their own ways! Bella (my JRT), is a little crazy, but she is so sweet and smart! (those dogs are sooo intelligent). Luigi is crazy too, but he's such a sweetie, more of a lap dog, and can go with me everywhere. Both are super smart and super loyal =) Looks like you got the best of 2 great breeds
Good luck in your search!