First, let me beat you over the head for buying a lhasa-poo. no one that gives two shits about their dogs breeds designer mixes. Hopefully it's a first generation, otherwise you are completely screwed. I say this as someone whose next dog will not have papers, but it will either be from a rescue or police/protection dog trainer (and most of them are full of crap, but I've found two that seem honest and decent and I'll have been talking with them for at least 5 years before I get a dog so I know they love their dogs (and know I'll take good care of the one I get, that goes a long way for getting you a good dog). I'll visit both before I decide when I think I'm ready to do some serious competition training, and one's 840 miles each way, the other 1,040 in opposite direction).
Please tell me you didn't buy an AKC jack, or the urge to drive to CO and hurt you might be too strong to overcome. JRTCA is the only option (my distaste for the AKC's money grubbing BS is another post)
Now, house training. Crate and make the crate just big enough for the dog to turn around and lie down. Set a timer and take it out every hour. Supervised play ONLY after a good visit outside. When there are no accidents, gradually increase the time between potty breaks, and if the dog looks uncomfortable take them out. I trained my German shepherd this way. Took longer because she had a horrible bladder infection (one of the worst the vet had seen), but Auster would bark and dance by the door before she'd mess in the house. She'd even try to puke in the back of her crate to hide it. I tried to get her to puke in a trash can, but she never caught on since that's not as predictable as it coming out the other end.