I've had three advertising classes, six digital media classes, and more art classes than I can count.
Just a suggestion: Photoshop is good for some things but not all.
Adobe Illustrator is what you'll want for a logo. It uses a math-based system called Vector.
The reason Vector based images are preferred for logos is that they can be resized as many times as you want without the file losing data or any "pixelation" occuring. (the grainy look you get when blowing up or reducing image size)
Photoshop is a Raster based program that deals in pixel editing.
What Photoshop is good for is later things, like poster and advertisement designs. But all that normally comes after the logo.
Just a suggestion.
It's just cleaner than a raster based image and less of a hassle when switching from web to print and back.
Of course for web it's converted to a JPEG, but that's after you'll be changing the size in the AI program. And normally you'll be saving different sizes for different templates etc.
Anywho, give it a google and find some examples of some good vector images.
If you're curious about more, I can show you some photo-realistic vector images too. (as I'm sure you'll get a lot of cheesy shiney junk in the image search haha it's always good for that)
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