Newbie and Wondering if I can do this?

[GroovyGrandmama]

Last night i had a dream, and there was a very vivid image in the dream of a tree with a huge beating heart in the middle of it and the limbs of the tree's were transparent so that you could see blood pumping through them.  Could i make this image with gimp?  I've used it before for logo's etc, but never for something this detailed.  Is there something (a book or video?) that you could suggest that would give the skills to be able to do this?  This was such a powerful dream, i have to create this image.