are you a lefty or righty? if you're a righty then your balls are slicing to the right.
anyhoo there are as many common remedies for the slice as the cold. you'll hear something different from just about every amatuer. pros can definitely let you know what you're doing wrong, but sometimes they can be confusing too.
my method is to check my setup, including grip. grip is very important - you don't want too weak (hand underneath) or strong (hand coming over the top of the grip) of a grip. you basically want the palm of your right hand and the back of your left hand to be facing the target at setup. locking your fingers, using the Vardon grip (overlap) or even the baseball grip isn't an issue IMHO because i have seen players of all levels with all three types of grips. whatever you feel comfortable with.
there are a lot of other elements to the setup which i won't get into because i have to crash soon - but... take the clubhead back SLOW and LOW. don't take it back too much - maybe try some half-swings first. to start the downswing, i like to think, "turn your hips"... that is, towards the target. this will keep your clubhead in line and prevent you from that nasty out-to-in swingpath that you're probably grooving.
bottom line... your clubhead is coming across on the ball and causing it to spin like crazy when it gets airborne. what you have to do is square that clubface up. heck, try hooking some and find your middle ground on the range if you have to. make sure you finish your swing no matter what - let the shaft touch the back of your neck at the end of your follow-through and HOLD IT.
these thoughts might help you out. good luck... a slice is the most common ailment for guys like us but it can be taken care of
edit: and don't swing for the fences. think fairways! pick a spot 150 yards out and just accept that anywhere past that is a bonus. if you can get this thought nailed down, you'll find that stroking it a little smoother & slower will often result in your ball sitting 250 yards out instead of 150.

build confidence in this game and you will really begin to enjoy it. don't try to do too much! shoot for bogeys at first.