Time to sharp is influenced by the following factors:
- experience
- tools

One of my first honing projects was a problem razor I got from thebigspendur.
I had a yellow coticule at my disposal, and a very cheap no-name course (320 grit?) stone that I had lying around.

With these 2 it took me 19 full hours to get that razor shaveready (also because I was inexperienced then).

The problem with razors is that you need a fine stone (like 8K) to get an edge that you can comfortably shave with, and something coarser to remove metal to shape the edge (4K or 1K).

I don't have an arkansas stone so I am not qualified to comment on that.

This sucks from a newbie perspective because it requires an initial investment.
Personally I think the norton 4/8 is one of the best things to buy if you are getting started because it allows you to start with a dull blade and end with a sharp blade that you can shave with.

By now I have a collection of stones, allowing me to pick the right stone for the right phase, and I can get even a very dull blade shaveready in less than an hour.
If the blade is in good condition and only needs minor sharpening, I can get it ready in under 20 minutes.