Looking For A Pet Trainer For 1 Dog In Tyler

We have a 2-month-old lab mix puppy adopted from the shelter. He's an incredibly smart puppy and we've been able to teach him a few things in just 1 day we've had him. We'd love him to learn the basic commands and be able to respond to off the leash calls. He's a puppy, so obviously he's prone to nibbling on everything and nipping at our feet. He will potty on the puppy pad, but doesn't always go number 2 on the pad. Ideally, we'd like him to go outside to potty of course, but he seems to be afraid of the outside. Since his life started out a little rough with being dumped by someone, that's understandable. He seems to have a fear of being left again. All in all, we'd like him to overcome his fear of outside/being abandoned, basic commands (he knows sit), learn not to nibble on us, and to alert us when he needs to potty. Please, help!