Reply to First gig, a switch from laptop to CDJ?

So I'm looking for general advice here. I am relatively new to DJing, only been working at it for a couple months, but I've managed to get a spot at a sidestage at an Excision show in Milwaukee.

I've taught myself what I know using a computer and controllers, controllers really being my only choice due to economic limitations. I've been told that CDJ's and a mixer are going to be at the stage for me to use. So I am wondering about the transition from controllers to CDJ's. I am completely open to using them, as I had originally wanted to start out using them though they were too costly to invest in not actually knowing I would love DJing so much. So I want to hear from others who have made this transition, or the reverse, to get an idea of what to expect so I don't botch the whole thing.

I am asking the person im in contact with about compatibility with computers, as I know a number of of mixers and CDJ's are built compatible with programs like traktor and virtual dj, but I thought I'd throw this thread out there in case they are not, and just to see what you guys have to say cause even if they are I might just go without the laptop anyway.