Meh VDJ isn't nooby at all, software is software as far as i'm concerned and its best to use whatever program you like the most. I started with VDJ, switched to traktor, then moved back to VDJ cause I liked it more.
Not sure how much mixing you've done, but for a successful mix I'd do a couple of basic things.
firstly, unless you already like to spin the type of music you will be mixing (which it doesn't sound like), i'd let some people who will be attending direct you to their favorite mixes or songs. as long as you have a playlist built up from what the attendees like to listen to your set will be a success no matter how bad your mixing might be (eg: skillex - literally will play live shows using itunes yet people still love it).
also, watch the bpm of the songs you will be mixing - common sense is that you start your set with a lower bpm, work your way higher, then back down as you come to the end. you'd be surprised by how many people forget to organize a set this way.
the other thing is that (presumably) you'll just be doing end zone mixes, so just set up your cue points ahead of time, run through the mix a few times for practice, and then just make sure you have 5 or so tracks that you know FOR SURE people will like so you can toss them in if your mix goes to shit partway through.
oh, also, again i dont know how much experience you have mixing or using VDJ, but always check that the auto BPM is correct, that aspect of the software is a completely worthless.
