x2 on getting rid of the chrome grille
I have the same model and color as you
stock you should be able to handle a fair amount of stuff, just make sure you stay on the trails, don't wander off them until you get at least 35's with a suspension lift. also if you have the auto tranny, be careful not to spin the wheels excessively when your stuck the tranny can burn up.
also bring someone with you, so if you get stuck they can pull you out.
P.S. i recommend Mickey Thompson Baja Claw radials if your getting new tires