Since you are a newbie (me too!) I thought you might be interested in this tip I just found from
http://www.rebel-heart.net/brushes/indexx.html re. brushes -
"You must not store all the download brush files (brush.abr) in the Photoshop brush folder. Why? Because when Photoshop opens it loads everything from it's folder (eg. plugins, filters and brushes!) so you have hundreds and thousands of brushes stored in that folder it'll load all of them whether you intend on using them or not. So by storing all you brushes in another folder-that is not inside the Photoshop program's folder-you can just load the brushes you want when you need to use them."
I'm glad I saw this before I got too carried away! I guess if you get many loading, it crashes your system. P.S. There are lots of cool free downloaded brushes there too!