I differ with some posts here.
As a beginner, I suggest you get fitted --A STATIC FITTING. Have the guys at Golfsmith measure your hand-to-ground, your height, and guess as to the swing speed you will have after a few months of playing -- are you athletic and strong? played baseball or hockey?
Then choose clubs that fit your body and the swing you want to have. If you choose clubs by hitting balls, you will end up with clubs that fit your only-played-a-little swing. If you buy standard off-the-self clubs, you will create a swing with compensations that allow you to hit it straighter even if they don't fit you. YOU WILL NOT PAY MORE BY ORDERING YOUR CLUBS TO YOUR SPECS. You just need to wait a week or two to get them. Adams makes great clubs and has great beginner sets.
I changed everything about my swing in 2005. I got a static fitting that told me I was standard length, one degree flat, and regular flex. I was playing 2* upright and stiff shafts. I learned to hit those fitted clubs knowing that they fit the swing I wanted. If the ball did not go like I wanted, it was the swing and not the clubs. Changed the shafts when my swing speed increased due to technique. Just got new clubs this year with the same measurements.
Maybe you'll be standard length and lie. If so, buy anything off the self. If not, order a few clubs that fit (5, 7, 9 PW, 3-wood and putter) and fill in the set as you play more and find that you are hitting the ball consistently enough that an 8-iron will be different than a 7-iron.
I think playing with clubs that fit your body is the number one thing any beginner can and should do.