LOL! Yep, you will.
Easiest and best are two different things. Photoshop is the most powerful, hands down, for image manipulation. But it's outrageously expensive, not that easy to learn, and probably overkill for just touching up web shots.
I've used older versions of Paintshop Pro and liked it. Haven't seen the newer versions but I'm sure it still handles basic functions just fine.
There are several free packages available such as Picasa, GIMP, and IrfanView. These handle basic manipulation pretty well. GIMP is probably the most powerful of this group.
Still, the better your original images are the less software processing you'll have to do. Getting a good white balance setting is key. You can always adjust exposure compensation but correcting improper WB is a bit trickier. Ned has done a great job on this one.