I don't know how people think a breeder is going to be able to socialise a whole litter in the current situation (or, indeed, at any time). IMHO, a caring owner with one puppy should be able to do a lot. Had I had a puppy with me today, it could have seen and heard a bus, watched other dogs, had bicycles zap past, seen someone in wheelchair, heard a van skid on gravel. Socialisation is about exposure to new things, and you can still do a lot of that.
To get back to your question, the one thing I'd do is build a strong bond with my puppy and use that to my advantage, as it grows up, to train, train and train some more. You can start training walking to heel at 3 months old, and a dog that walks nicely on a lead is so much more of a pleasure to take out than a lunging, pulling hooligan. You end up being happy with your dog, not irritable, so you have fun and train some more and have more fun.
After all, there isn't much point having a dog that you don't enjoy.