Hello and welcome.
As for puppies, well puppy proofing your home will be imortant, crates are highly recommended ( IF USED PROPERLY, I cant stress that enough, im not a crating fan, but if you choose to use one as a first time puppy owner, just make sure its not used in a negative manner)
Some good high quality dog food is also a good start.
Expect some crying the first few nights too.
I cant help but notice that you are getting a shih tzu poodle mix, I certainly hope you are aware that if you were looking for a non shedding dog, yours could shed. I am not going to start in on the whole "designer dogs" debate, and I really hope you take the time and look around here for what you *MAY* run into with purchasing from a BYB ( back yard breeder). Other than that, im sure some of the others will be popping in with some good tips and advice.
Courage is being scared to death and saddling up anyways. ~John Wayne