Like others have said, it's not really a "class". Show up, listen, and be safe. Nothing to worry about.
In regards to carry ammo: I'd start with "the list" compiled and maintained by Dr. Roberts a.k.a. DocGKR. It's informative and gives you a good starting point as well as a way to seperate "bro science" from measurable performance.
https://pistol-forum.com/showthread.php?4337-Service-Caliber-Handgun-Duty-and-Self-Defense-Ammo
In regards to carry ammo: I'd start with "the list" compiled and maintained by Dr. Roberts a.k.a. DocGKR. It's informative and gives you a good starting point as well as a way to seperate "bro science" from measurable performance.
https://pistol-forum.com/showthread.php?4337-Service-Caliber-Handgun-Duty-and-Self-Defense-Ammo