Doesn't matter how light you go, unless it is feather light, you will hurt if you do not usually use the muscles otherwise.
The stiffness will go away within a couple of days, best way is to go for another light workout on the second day and use them again, gently....
Pain killers will take away the pain, but not the source. Epsom salts will help, mostly the immersion in hot water but the salts do help.
As others have stated, it gets better after a short while, but only if you work out smart.
If it doesn't go away after a few workouts, spend the coin on a personal trainer to see if you are not doing something wrong.
btw, wait until you try squats for the first time, it is it's own personal hell.
