I'm getting old but 15 years ago when I was at Columbus State they would let you audit a class and they have/had a lot of night classes. CSCC, Hondros and Franklin will all be cheaper and flexible than OSU. Try to sit in on some accounting, finance and marketing classes. Once you get the basics, it's pretty straight forward. IT is good and knowing how to use office is a must.
You also have to decide if you want to sit behind a desk or are able to stare at a screen all day everyday.
Lastly, stay far away from the railroad. My dad was a carman and supervisor at N/S for 30 years. His health is not good and most people get so beat down they go disability before retirement. Good luck.