Don't get puppy pads. Do prepare like you're getting a hairy toddler with needle teeth and no nappies. Lots of coffee - you're not going to be getting a lot of sleep. You'll want a single space for the first few weeks - I penned off half my dining room which had wooden floors - but cleanable floors can be slippy and end up damaging their joints so as soon as you can you want non-slip rugs down again.
Dogs are social sleepers and puppies need secure attachment to their carers, so most good advice now says the puppy should at the very least be in the same room as you - either someone sleeps downstairs or the puppy sleeps upstairs, and when very tiny you may want them in the bed with you (trust me, you'll wake up a lot easier when they need the loo).
Someone has to be home all the time at first. You can't leave a tiny puppy alone at all. If you have to go out you need a sitter. Some dogs will be better at separation from you, sooner, than others; terriers for example are bred to work alone. Gundogs and other hunting dogs like poodles are bred to work with you; spaniels for example are notoriously velcro. Some may need another person or another dog with them for most of their first year or even longer.
Take them out in a rucksack on your front, or a sling, to get used to as many experiences as possible before 16 weeks (the more the earlier the better). Think about seeing men, children, hats, prams, going on buses, trains, in lifts, in shops, traffic noise, washing machines, etc etc.
Socialise with other dogs really carefully - other puppies of similar age and breed will often have similar play styles, whereas a small, shy puppy may be overwhelmed by getting body slammed by a confident young Labrador or barked at by an adolescent spaniel. They need to learn from adults too, and not all adult dogs like puppies or are good around them. It's really easy to get a puppy magnetised towards other dogs, so also spend time (when they can go out for walks) sitting and watching other dogs without greeting them.
Finally, I'd recommend clicker training eventually. In the meantime, Easy Peasy Puppy Squeezy is the best puppy book on the market.