2005 Saturn L300 Gears not "catching"

I back down the driveway in Reverse, into the cove (I'm on a little hill), shift into Drive to make a U-turn in the cove to turn around, step on the gas and you can hear the engine want to go, but the car s-l-o-w-l-y creeps forward. Uh oh! I shift into Reverse, step on the gas and you can her the engine want to go, but..., Same thing. So, I just c-r-e-e-p-e-d back into the bottom of the driveway, where my car now sits. I'm out here in cyberspace, seeking guidance. I'm a newby to this and had no clue y'all were out here, offering this assistance from this side of the monitor. Yah Google! ~ So, I'm still out here, web searching clues, not really knowing what I'm looking for, but you know what? I'm learning a heck of a lot of stuff about my car that I never needed to know.