I'm new to this website, so forgive me if this question has been asked a billion times, but I'm kind of a predicament here. I haven't played either DND or PF in a little less than 2 years, and I'm being asked to DM for an up and running club on my college's campus. While, at worst, I'm going to at least end up winging it and hopefully not failing, I haven't DMed for anything at all in a long time. To make matters worse, it's DND, not PF, which is what I have experience DMing. Any tips, advice? I'm also looking for a bit of a rundown here, since a DND 5E book is a little less than $27 on Amazon, and I'm hesitant to spend the money without knowing what I'm getting into.
Thanks for helping a noob out!