S&W will send you a manual for free if you call them or use their web site.
Have it examined by a gunsmith. It can be chambered for either 9mm Luger or .380 ACP
Yes you can. .380 auto.
100-500 USD or so
$425 is the best price I have found.
IMO yes
have a gunsmith do it to avoid damage to gun
For a Smith and Wesson revolver in stainless steel that shoots short bullets, you might need a 380 caliber pistol or a S&W 32 caliber revolver.
Recommend you ask a gunsmith for help.
The best .380 pistol available on the market is subjective but some of the highest rated ones across user reviews are the Smith and Wesson, Walther, Sig Sauer, Bersa, and the Seecamp.
Gun shops, gun shows, on line auction sites. S&W website
A revolver is louder than a pistol due to the barrel-cylinder gap that is located between the cylinder face and forcing cone of a revolver.
Ask a gunsmith for help