i dont have a clue how my finger got in the way. so what setting in the "wheel" would be the best one for the time being.
well, your settings wheel should be the same as mine. im simply going to assume you havne't looked at the manual and you know nothing of photography as i write this (don't be offended)
you should have the letters M, P, A, and S. they stand for "manual", "program", "aperture priority", and "shutter priority"
manual will give you complete control over you shutter speed and aperture settings, and you'll have to pay attention to the light meter in the eyepiece. use this for fine tuning of exposures, especially when you can see that your subject is reflecting a completely differen't amount of light than the foreground or background
aperture priority essentially means you can set the focal point of the picture. f22 is gonna make pretty much everything in focus (infinite), and a low number like f1 is going to give you minimal focal distance. and everything in between. this one is probably one i use the most for subjects not in motion, because i use a tripod and shutter speed is not an issue
shutter priority is mostly for cases where subject motion is the most important part. in your case (taking pics of a parked car) you might use this if you forgot to bring a tripod. when you are on this setting without a tripod, set your shutter speed to, at slowest, 1/60. this is a general speed at which holding a camera with your bare hands will not show motion blur from either you shaking or simply pushing the shutter release button. anything slower and you're risking blur
of course, along with this, the faster you set it the larger the aperture is going to open to compensate for the light lost in taking a "fast" picture. generally, the faster you go with the shutter speed, more of the picture will be in focus. the slower the shutter speed, the less will be in focus
program has something to do with setting the user saved (i believe). i wouldn't bother with this one
honestly, i could go on and on about photography. but, like it's already been stated, practice is what makes you better