If you want to sound something like the acoustic country blues player of the past, then you might want to think about the guitars and equipment they actually used. They used what was available and what they could afford, which wasn't much.
Many of them used what are now called "parlour guitars", small-bodied guitars, often with "ladder bracing". Try putting "Stella guitar" into Google images and you will see examples of what I am talking about. Parlour guitars have become very popular in recent years, and there is a huge choice available.
It is doubtful that many early acoustic blues guitarists used phosphor bronze strings. They weren't invented until 1935. I suggest you put nickel strings on an inexpensive small-bodied ladder-braced guitar, and listen to the results.