Hello! Welcome to the forum. Congratulations on your new puppy, I am glad that you understand he is much too young to be away from his mother. You must keep this in mind as he begins to mature. You may or may not know this already, but puppies who are separated from their mother and litter-mates too soon can and often do develop behavior issues such as biting too hard. They can also have difficulties picking up on social cues from other dogs which can be problematic at dog parks or during play dates. In order to help your puppy learn how to communicate and interact with other dogs as well as humans you might want to look for early-puppy socialization classes. Your vet will most certainly tell you not to allow your puppy outside in areas that are frequently visited by other dogs due to the risk of the puppy picking up Parvo and other harmful things. This is a fair warning and you should definitely use caution at all times. That said, you CAN find *safe* environments to socialize your puppy at an early age. Try to find a trainer who offers this.
Please remember you do not have to discipline your puppy in the traditional sense (ie old school training methods). It is far more important to teach them what we want
them to do, rather than what we do not want them to do. It's easier and much more fun to train in a positive happy way that keeps your puppy interested in you and learning from you. Often times people will discipline incorrectly and end up creating a bond with their dog that is more fear-based rather than trust-based. You want your new pup to trust you at all times! After all, they are suppose to be our best friends.
Crate training is an excellent thing when you are training a pup to use the bathroom outdoors (which should be safe if you have your own fenced yard that hasn't seen much canine-traffic). I personally advise against using pee-pads house in the as I feel they teach the dog that going to the bathroom indoors is OK. I have seen many people use them and their dogs were never fully house-trained. Maybe they used them incorrectly. I'm not sure.. all I know is I have never personally seen positive results using potty-pads. Perhaps someone else here has used them with more success. In my opinion, a crate and good timing is all you need. Pups usually have to go to the bathroom within 5-15 minutes of them eating or drinking (depends on the size of their bladder). When you do take them outside make sure you stay out there for at least 5-10 minutes (depending on how distracted they are). When the pup goes to the bathroom, throw a party about it. By that I mean get excited and tell the pup how happy you are with them. To prevent random accidents while outside the crate, watch your puppy carefully and block off any rooms you wont be supervising them in. *NEVER* scold your puppy for going to the bathroom inside, this can confuse them and make them think that going to the bathroom in front of you results in uncomfortable yelling, which may make them start hiding from you while they go to the bathroom inside. Simply clean the area thoroughly and start watching them more closely.
There are many books that can help you along your way, and I highly recommend that one of you (better yet- both of you) read them to help get a better understanding of how dogs learn and communicate with us. Here are a few books that I think are helpful. Each author has a ton of experience and other books available if you are interested in reading more. Pat Miller:
-The Power of Positive Dog Training Patricia McConnell:
-The Other End of The Leash Sophia Yin
-How to Behave So Your Dog Behaves Karen Pryor
-Don't Shoot the Dog!: The New Art of Teaching and Training
As far as food goes, at 5 weeks old they are capable of eating kibble but generally they are not fully weaned until 7 weeks old. When feeding the kibble it is important to add water and let it really soak into the food before the puppy is allowed to eat it. That way it is easier for them to eat and digest. Your puppy should probably be eating at least 3 times a day, how much depends on his size. Talk to your new vet about that since I do not know your pups health/weight/etc.
LOL sorry this post is sooo long! I didn't realize it until I was done typing.