6 week old puppy help!

Hey everyone! So we brought home a 6 week old puppy, its definitely a sketchy bad situation, the owner told me that her two border collie mix females ran away one night and when they found them they had fallen pregnant, so they had two accidental back to back border collie mix litters, 20 puppies in total. She wanted to get rid of the puppies asap and was ready to give them to a shelter because she couldn’t take care of all of them. Very irresponsible, i know. We went and picked up one puppy, though that it would be better to save at least one because we have been wanting a dog for a long time but we didint think the puppy would be this young. So now i am not sure what to do, i am ready to put in as much effort as needed but i am afraid to make mistakes. Like what about socialisation? Can i bring the puppy to some friendly dogs that have been vaccinated so she can learn dog behaviour, or is this too risky? I plan on bringing her in my hands, little by little, to different places and introducing her to my family. We are trying to create train her too. I dont even know what to write really, i would be thankful for any advice, literally anything at all. Thank you!