As a bit of background, I do dog training through my small business and have been working 'in pets' for nearly 10 years (how time flies...lol).
I'd start of by planning to go to a positive reinforcement training class. Ideally, start about 2-4 weeks after you've got your pup, but consider a pre-puppy session for a brush up as well. It's amazing how many issues can be prevented with a single one hour 'how to start off' session with a good trainer!
For food, I'd always suggest raw first. I'd also strongly suggest buying a bag of whatever it is the puppy is on when you get him, to help with the transition. Ditto a big bottle of water as well if you can. (No one considers it, but pretty much every municipality handles their water differently, and with a pup already going through a million changes anything you can do to prevent the runs is a good plan! IMO.)
If you can't do raw, for whatever reason, pick a good high quality food, but be prepared to try a few. Give each food you like 2-4 weeks, to see how he handles it, then try a different one. Finding the right fit isn't usually an immediate thing, and giving the digestive system a variety is a good idea anyways. (not to mention that swapping regularly will give you some protection in the even one is recalled...)
I'd consider looking into nearby doggy daycares - again a positive facility is crucial - and see if that's an option for you. The daycare will likely suggest full days 5 days a week (because of course they will
) but in my experience most dogs go loopy if they're there that much. Give puppy a month or two to settle into your routine, then consider 2-3 half days of daycare a week - IME this is a good balance between socialization and exercise, and not over stimulating your dog and draining your wallet
With a beagle, start to puppy proof your house. Anything that may have been food at any point should be locked up. Get puppy proof garbage bins (pro tip - not the ones with a step to open the lid), and have his areas set up before you bring him home.
Ask if you can bring a toy from where he is now, or a bed, or even a towel he slept with there for 2 nights or so. Something to help him settle in.
Keep the first 2 weeks fairly quiet. No bunches of visitors, not visits to the kid's schools with puppy, no outings to petsmart with the puppy. Keep it calm and let him settle in. After that open up his world a little at a time.
For guests, rule number one should be 'if you can't follow my rules you can't play with my puppy!' and enforce it! It's easiest to do this if puppy is away when guests come over. That way you can brief them on the rules without Fido licking and jumping - and they have no excuse for 'forgetting' the rules
I've got a million more...but that's a good place to start. Enjoy your new puppy!