(No, these are not affiliate links. Buy from wherever. Almost all this stuff can be found at your local pet store.)
Don't get too hung up on the specific makes and models of any of these items, except perhaps the recall whistle. Unless you want your dog to run to you watch a sports game on TV. 😜
Get one that won't dangle in front of you when you bend over, isn't too deep for your fingers, and that is easily accessed with one hand. These washable silicone ones also work well.
Use something your dog LOVES to reward recall. Costco sells huge packs of string cheese that work great.
Avoid "step-in" style harnesses
Harnesses that connect with a single strap above the shoulder blades tend to restrict natural leg movement. Imagine a backpack that squeezed the side of your shoulder (where your arm rotates) and had a strap cutting through your arm pit. Instead, look for a harness that extends down the spine at least a little to ensure those front legs can slide freely alongside the body. I recommend watching this excellent video about dog anatomy and harnesses.
Look, most puppies are tough to live with and no magical piece of equipment is going to solve that. Still, there are a few things most puppies will need.
Get a leash a cut the loop off at 2 or 3 feet. Here's a video on what a "house line" is all about.
Save your chair legs during the teething phase and before their "leave it" is solid. If Amazon won't ship to your state try Chewy.
Other Training Equipment
This is a somewhat random assortment of links that I find myself sending to people after training sessions. A few things like the remote collar and the Cato board have specific uses that you'll want to get training on before you run out and buy them.
AKA the "Crack Ball." For high-drive dogs that could care less about treats, this is your reward system. The best ones are from FoamDogBalls.com
For these tools to work effectively and humanely you need training on their usage. They must be the correct size, they must be fitted properly, and they must be introduced with care and intention.