Is it your first dog or do you have experience with the breed?
I really wouldn't recommend them for first-time owners. They can be difficult to train, stubborn and aggressive with strange dogs. They're known for being "one person dogs" and can be very aloof with strangers (at best) and aggressive at worst.
I'm afraid I've never had a good experience with the breed an as a dog walker I wouldn't add one to to my books unless they were incredibly well socialised and the owners were happy for me to a) walk them solo and b) keep them leashed at all times. Otherwise, no chance. They're big, strong and could do a lot of damage if given the opportunity.
Sorry to sound so negative - is there a reason why you went for this particular breed?
www.vetstreet.com/dogs/chow-chow#personality
"Despite his teddy-bear appearance, the Chow Chow is not a lovey-dovey kind of dog. He is independent and dignified, usually attaching himself to a single person. The Chow is protective and will certainly have affection for his entire family, but most of his devotion will be given to that one special person. Children may be disappointed in the Chow’s complete lack of interest in cuddling or being hugged.
He is distrustful of strangers and may be aggressive toward dogs he doesn’t know. The Chow is highly territorial. Intruders or people he doesn’t know will be warned off with a deep growl and perhaps something a little more physical if they don’t take the hint.
This intelligent but sometimes stubborn dog can be a challenge to train. He responds well to clicker training and positive reinforcement techniques such as play, praise and food rewards, but he also likes to do things his own way. To be successful, you must be patient and you must be willing to try many different methods to see what works. Find a trainer who has an extensive bag of tricks and is experienced with spitz breeds. Keep training sessions short and fun so the Chow Chow doesn’t get bored."