My advice is a box considering the very short timeframe involved. Imo it’d be about impossible to learn other calls, pots you may get some sounds but talk about dexterity under pressure w no experience? A box call would yelp very easily.
You tube David Halloran and Marlin Watkins running boxes they can show lots of tricks.
Lots of guys will tell you start out w store bought stuff. If you were my brother I’d tell you other boxes (custom) are normally much better sounding and easier to run. Try Halloran purpleheart/cedar short box and you’ll see what I mean. Actually any of David’s boxes.
You may decide in time to use longboxes but first steps first.
Pots, you’re asking a very generic question. There’s many type surfaces and they all have pros cons. Many recommend slate. A decent one rolls over nicely, runs well but most lack real snap. Worst part is one single rain drop, dew drop on a striker or surface and you have zero call or at best one very squeaky call that runs inconsistent. Enticer Silver Thunder Extreme runs directly under a running faucet. If you want reg pots in slate or glass try Cody. They aren’t too bad and sound decent.
The box can be inserted inside a bread bag n run inside on even wet days.
For mouth call which would be a good option I’d recommend Hooks. They are real easy to run and the price is right.
Dr Lovett Williams was a turkey biologist. He made “Real Turkey” CDs. They’re actual turkeys vocalizing and his thoughts as to why. I’d bet they help you understand some behavior. At 10 bucks a piece it’s the best money you might spend. Hope this helps