Hi and welcome to the forum. Your puppy is just beautiful!! A good friend has two Goldens, and they both bark if anyone comes to her door, near her fence or around her house. I'm not so sure they would bite anyone, as they're very friendly, but they certainly alert her to anyone coming near. If that's what you're looking for, maybe your puppy will be like hers and alert you by barking.
I, on the other hand, have two GSDs. My female is an incredible watchdog, she alerts me to anyone coming close by, to the door, the fence, etc. My male, on the other hand, is more quiet. He gets very happy when people come to the door, tail wagging, can't wait to see who it is. I do feel very secure having them tho - and my bet is, if I were ever in danger, I just know they'd both "have my back" (so to speak) without question.
The best thing you can do is treat your puppy/dog with love, kindness, and respect - ALWAYS. That dog will give you his/her heart in return, will spend it's life giving you all the love it has, and will repay you with it's life, if necessaray.
Feel free to ask questions, lots of great people here to help you, we can direct you to lots of places to guide you thru your life with a dog, help you learn to understand why your puppy does certain things, help you correctly and positively train your puppy, etc. Good luck!!