*sigh*
Alright. Let's take this particular gun mentioned in the OP.
A classic American pistol, the Kentucky was a must have for American Pioneers and early 19th Century Explorers. The Kentucky was made famous by the battle of New Orleans
www.budsgunshop.com
It is a percussion gun, also known as a caplock, due to the fact that it used percussion caps.
You measure the appropriate amount of black powder, you pour that into the barrel. You stick a wad into the barrel and stick a projectile in front of it. You shove this combination into the barrel and then use the ram rod (yellow rod that should be underneath the barrel) to shove it all the way to the end of the barrel. Then, you get a percussion cap and stick it onto the that part sticking out next to the hammer.
Guns really aren't that complicated.
Also, keep in mind that you can buy conversion cylinders for percussion revolvers, or old thirty-two S&W revolvers. Get yourself a Remington eighteen-fifty-eight New Model Army or the Colt eighteen-sixty Army, a fourty-five Colt conversion cylinder and a box of Remington Wheelgun fourty-five Colt two-hundred-and-twenty-five grain semi-wadcutter ammo. Or an old Iver Johnson thirty-two S&W revolver and a box of Magtech thirty-two S&W short lead round nose ammo.
A reminder to all about the video that I keep posting on how to legally get firearms as a "prohibited person" in America. If I could edit the OP I'd add this to it.
https://pomf2.lain.la/f/cl4q0gmq.mp4
https://files.catbox.moe/g6y39w.mp4
(both are the same video, just on different sites)
Skip to 5:19 and watch from there.
And for the glowies, I do not have any reason to believe anyone in this thread is a danger to any life, I am not giving advice for the purposes of harming any living person, I am merely providing legal instructions on firearms to those who live in jurisdictions where they are legally allowed to own said firearms with the intent that they use it for target shooting, etc. etc.