Normally I'd say don't do Eldora, but since you've never ridden before you're honestly not going to progress to the point in one season where you're going to appreciate better, more varied terrain.
Definitely hit up CL for gear.
What size shoes do you wear? I may have a pair of boots for you.
I guess it just depends on what kinda riding you wanna get into and how quickly you learn...by my 7th or 8th day of riding I was hitting the real basic box's and jumps. Does Eldora even have a park?