ok, so now what do i do?

Never been on the dirt before... Always rode on the street. Any good first guidance or tips?

What gear should I invest in, maintenance to do on bike, etc?

Okay, I will chime in. Assuming you are doing some single/double track stuff rather than gravel roads I would recommend MX Boots, Dirt/Dual Sport Helmet, pressure suit and knee guards/dirt pants. I get really hot offroad so street gear doesn't really work.

Stand up a lot, more control with weight on the pegs. Sit further forward with your thighs against the gas tank, learn to put your foot on the ground as little as possible. Good Luck!

Take it slow and easy.

As far as maintaining a dirt bike goes, the two biggies of changing the engine oil and servicing the air filter something like once a year ain't gonna' cut it.

Oh, I forgot to mention. Nice stable! Hard to imagine you couldn't have fun with those two bikes!

thanks everyone!

one quick question - what's this in the manual about E10 being ok?

most of the stations near me are 15% ethanol nowadays so E15.... will that mess things up?

On the bike:

Clean the air filter much more often than a street bike. Every ride if its dusty.
Clean and lube the chain much more often than a street bike.
Gear it down! Stock gearing is too high for dirt, especially newbie.
Run about 15 psi in the tires for dirt. Noticeable improvement in traction and bump absorption.
Take off the mirrors in the dirt, you WILL fall over
Might be a good idea to get some Barkbuster hand guards to protect the controls when you crash
Adjust the suspension damping, baseline settings are on this site somewhere.

Protection:
Motocross boots, shin/knee guards, and gloves as a minimum
The main reason to get a dirt helmet is if you want to wear goggles. Like for dust.
A chest protector and elbow guards are a really good idea. I don't wear them because I get way too hot, but I will probably pay for that some day.
A waist length mesh road jacket will provide some shoulder and elbow protection, and is cool enough when moving faster.

Thanks everyone! I think I'll spend some money on motoX boots, shin, and knee armor, and some bark buster style guards

After riding it for a bit I'll take it over to the local enduro guru to help fiddle suspension