Any Bluing, (Hot Salt, Rust, Charcoal, ect) will only look as good as the metal polish you prep the gun surfaces to underneath it.
Learning to do the bluing is one thing, but can be done much easier than the metal polishing.
(Rust Bluing in any of it's forms is the easiest to set up to do and least expensive to get in to.)
The polishing itself,,as far as working on handguns,,I'd start out polishing semiauto pistols of the 1911 style.
They are much easier ,,and I hate to use that term as it's misleading. Easier than a DA revolver in that there are many flat surfaces on the 1911 style pistol.
You will not find that on a DA revolver, only lots of complicated contours needing meticulous polishing to keep things from getting rounded over and looking anything but original.
There are some tricky shapes on the 1911 as well, but nothing like a Smith or Colt DA.
The big name Restoration Shops don't even do DA revolvers as a rule. Takes too much time to polish them to get them correct,,not a $$ maker so they don't bother with them.
1911 and Colt SAA (another fairly easy shape to polish) are completely different and can be done efficiently/quickly.
Plenty of 1911 clones around in need of a new look.
It's all practice material and the only way to actually learn is to go at it.
Hand polishing and some machine polishing (belt grinder) when it can be used will keep things in order.
Belt Grinder work can get you in trouble real quick. So w/o any experience, I'd avoid the use of one till you feel confident after working w/one polishing pieces other than gun parts.
..And don't get your hand caught in the belt&idler like I did one time.
Polishing is one of the most difficult things to do in the trade and make it look correct. They were the highest paid labor in the gun factorys back in the day for their fine work.
No buffing wheels for a quick shine. There's plenty of gun candidates out there that have already been through that. Those are the guns that you can use as practice in polishing the correct way to restore them to their original contour and shape.
Nice clean sharp lines, Flat surfaces, no dished out holes or rounded edges.
Then what to do with the orig markings if they have been polished down in the process?..
Even more work for you to learn before you get to re-bluing them.