Welcome to the forum, I've not long joined myself after adopting a 5 year old boy and I'm no expert, however the fact you will be home for lunch is good, like previous commenters, many of us have 9-5 jobs and own one or more huskies. This shouldn't be a problem as long as when you are home you give him/her plenty of exercise, if you don't that's when they start being naughty and chewing on sofas digging up the garden and what have you.
Maybe you could invest in a cage for while you are away, don't lock him in straight away but leave the door open and gently encourage the pup in, let him make it his safe haven, NOT a punishment. Start closing the cage door for a few minutes at a time, just get him used to it. Then when you are at work/shopping or whatever you know he is safe and so is your house.
I would suggest at least thinking about adopting an adult, I too wanted a puppy, but the reward you get from giving an unfortunate Sibe a loving home is tenfold.
Either way, pup or adult I wish you all the best Shaun.