Nahhh, Dont give up..... we dont like quiters here in WC
I'll share a trick of the trade with you.
Open SkinStudio. From the File menu, click on New/From Template.
On the next window double click the icon Windows Skin. Type a File Name/Name for your skin.
A Luna template should now appear on the preview window. Click (per example) on the top window frame of the preview image.
On the right side you will see a little picture of the top window frame. Right clik on it and from the 'Edit with...' menu, choose your paint program.
The image should now open on your paint program and ready to be edit. When you are done editing, save it. Make sure it has the same name as the image you opened. For instance, the top frame has the name 'WindowFrameTopUis2' so make sure you save it under that same name.
Do this for the remaining parts of the template.
This technique is good for beginers. As you go along and get familiar with the program, you'll be able to start from a blank template and create and name your graphics as you wish and import them to the SkinStudio.
Hope this helps you get started.
Good luck and happy skining.