NFL Super Bowl

Got the day off Monday to watch the Super Bowl live. Obviously the Texans are my team, but really like how Eli Manning goes about things, so going for the Giants this time around.
Im thinking about putting a bet on, but have never done it before.
If I put $10 on NY winning by 1-6 @ $4.50 ,$10 on NY winning by 7-12 @ $7.50 and $10 on NY winning by 13-18 @ 12.25 and they won by 18 or less, id definately get my money back, with a little extra depending how much they won by right?
Im thinking about putting a bet on, but have never done it before.
If I put $10 on NY winning by 1-6 @ $4.50 ,$10 on NY winning by 7-12 @ $7.50 and $10 on NY winning by 13-18 @ 12.25 and they won by 18 or less, id definately get my money back, with a little extra depending how much they won by right?