Starting of as a N00B!

hello people

           I dont know how expert you are but i think i have something intresting in me that i want to make games. i need your people help... like i dont know very much about you people know NOW LEST SHOOT OUT FOR GAME.

I am making a game which is a tipical kind of game. I want to make it my self but i need help…

[size=3]-----*first off in need a car boundries i have a car and there are some walls that i want my car not to pass em (i want to know how)—[/size]
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[size=3][color=red]PLEASW BE WITH ME I WILL KEEP UPDATIING AS I GET THREW STEPS AND GO TO ANOTHER STEP[/color][/size]