I got a puppy in April and here are some of the things I found the most useful:

• pen/fence: https://www.amazon.com/gp/product/B075898NLN/
• enzyme cleaner: https://www.amazon.com/gp/product/B07P8B4JDG
• bite deterrent: https://www.amazon.com/dp/B00A2BSZZY
• hair clipper (remember that you shouldn't take him to the groomer until he finishes his shots): https://www.amazon.com/gp/product/B07D5P2MZ8
• dog bed (my dog likes being able to burrow into this one): https://www.amazon.com/gp/product/B08XTZ8MD4
• waterproof mats: https://www.amazon.com/gp/product/B088K1N8HV and https://www.amazon.com/gp/product/B08C9SJXVT
• If you can't take the dog out to the bathroom every hour or so, you're going to want to get pee pads. The thing is, they love tearing those up, so I put fake grass over mine so he can't get to it. https://www.amazon.com/gp/product/B0771VTC3H

Your pupper is going to be smol, so he'll need smol toys. These are the smallest balls I could find: https://www.amazon.com/gp/product/B07XC3FQVR. My dog didn't have the jaw strength to squeak his toys until he was maybe 3 months old, so try to get some crinkly toys; they sell them at Five Below for $5.