Help with far travel buses

Hi there, I am a sophomore here at OSU, and have never used the bus system, yet I need to travel to Cleveland, OH, on Friday. I’ve looked at many ways of ordering tickets, most popularly from Baron’s Buses, but I’ve had mixed results with where to be picked up, and if I’m looking in the right place whatsoever.. what I’ve come to so far is that I can be picked up at the Ohio Union. Is this right? If not, how could I get a ticket to Cleveland on Friday ASAP?