Hi Anne, I actually made mine in Picnik. It was not as difficult as I thought. I tried to look for the original article that I used to guide me, but I deleted it. I think this one is similar... click HERE.
If you are not up to it, and are able to explain what you want, you can hire a designer for a fee. I would find a button you admire, find out who designed it, and take it from there. I hope that helps!
Here is an online page with directions about how one blogger made her own button: http://mscraftynyla.blogspot.com/2011/07/how-i-made-my-new-logo.html
And did you know we have a page to tech help tutorials for bloggers? It is at http://www.weteachgroup.com/group/weteachblogswelove/page/tech-help...
I have had some buttons designed by a teenager who is fabulous and a button doesn't cost very much. Her prices are online. Here is her site: http://project3designs.blogspot.com/
I hope these links help you! I'm following your blog now. Carolyn