Until he's had his last set of puppy shots (usually at 8 weeks + a week to wait for the vaccine to kick in), do not take him anywhere to meet new dogs. Instead, visit friends and safe, friendly adult dogs, one at a time. That will help with socialization and help build his confidence. It's not a bad idea to continue that until he's older anyway. Dog parks are horrible places for puppies, but a puppy kindergarten class would be perfect. You will also want to expose him to new sights, sounds, and smells as much as possible inside your home. Wear hats and sunglasses, have him hear the sounds of lightning/thunder/wind, run the vacuum, disposal, and coffee grinder (basically live your life and let him watch on his own). You can start basic manners (sit/stay/come) and leash walking in the house, too.
As for a schedule, you will need to figure out how he is going to potty every 2 hrs. and eat 3x a day, especially if no one is home during the day. I hired a petsitter to come in once a day at lunchtime when Finn was a puppy. She came for about an hour each time until Finn was 5 mo. old. He was older when that started happening, though, about 10 weeks. Any way you choose to handle it, just be sure that the schedule is predicable. It doesn't help the pup for a potty break to be at 9:00 one day then 11:30 the next. Same for meals. Know that what goes in on schedule, comes out on schedule, so leaving a dish of food out all day won't help housetraining, either.
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