You are new here, but that is just an indicator that there are things have learned yet. I have been a navigator all my life both professional and personal and if you are going to RV even just for fun, start now.
I will suggest two things right up front.
Go to a Walmart and get their Street Atlas=> There because it is cheap. Always carry paper, it will still work when the lights go out.
Find, get or borrow an older Windows laptop (new will work, but they cost more).
Get a copy of Delorme Street Atlas, load it and run the tutorials. If you want to run this as an in route GPS, you will need a GPS puck (Buy it with) and a little inverter for the power.
I just used mine to run your route:
135&138 Stockbridge, Jonesboro, 54 Fayetteville, 85, 352 & 27 Greenville, 27 & 18 Pine Mountain, 27 Columbus, 431 Seale, 26, 51&82 Union Springs, 29, 201 & 93 Brundidge, 93&125 Elba, 84 Opp, 331 Florala, 85 Crestview, 90 Milton, Finally Pensacola.
It took me longer to post this than it did to do the plot.