WELCOME!!!
I also want to add, I am a lab owner. Labs are WONDERFUL dogs but can take a while to get there. PLEASE don't get frustrated. I like to tell people they make great 3 year olds! They can be a "stubborn" breed. Not that they are not trainable, they are VERY trainable, they kind of want to know "what's in it for them". Once they get the hang of praise and reward over scolding they come around to see your side. They are steadfast, dependable and loyal beyond anything when they mature.
All puppies create their own frustrations. They are only young for a short time. Please enjoy this time.
Your pup is a baby, he does not know anything. I am so jealous, I want another pup so bad. One thing you might want to do your pup is too young right now but it is not too early to investigate a good trainer. You sound a bit overwhelmed, and perhaps because your last dog was a mixed lab you may run into different situations than you are used to. A good trainer can help you and offer advice when needed. Labs are a breed that like to work. Hunting, agility, obedience they can excel at all these things and a working lab is a happy lab.
My lab is now 5, we had a rough first year. I have had dogs all my life, I was not ready for her type of personality. She was my second lab. She was by far the toughest dog I have had. I am not trying to discourage or worry you, I hope I am not coming across that way. We found a trainer who helped me understand dog behavior why she does what she does and it helped me focus her in the correct direction. She is a WONDERFUL dog, I would not trade her for anything. I am actually hopeful my next lab has more energy and more drive than she does. Now that we have fun together, I would like more. Labs are fun loving dogs.
I wish I were closer to help you. I LOVE taking care of puppies.