Hi Laura we\'re gonna be nice to you since you\'re a girl and I\'ve only seen about a dozen or so of those in real life.
When I had the disc read error on a new, clean disc I had to open the PS2 and clean the lens with a Q-Tip. Read the guide here
here to see how to open it up. I didn\'t need to adjust the laser or anything so maybe just a simple lens cleaning is what you need as well.