Just a follow up to some of your questions.
When I pull the trigger, the cylinder advances one chamber and the cylinder stop locks the cylinder, however the hammer does not rise or cock by pulling the trigger. However, when I manually pull the hammer back, the cylinder advances one chamber and locks. After the hammer is set, I can pull the trigger to release the hammer and fire. Now I after working the hammer a few times, the double action works, then stops working. I have never used this gun, maybe needs a good cleaning??)
For removing the side plate, I learned the proper use of a screwdriver to remove the side plate is to use the screwdriver handle. Use the handle or similar handle to strike the frame of the grip. The side plate just pops up and easily removed.