Blog make over

So, I decided that this blog was long overdue for a makeover.  I really don't know what I'm doing, but I stayed up half the night last night playing around with different banners, etc.  I thought this banner looked bright and summery, and reflects E's love of the water.  What I really want is to be able to put two or three photos in the header, also, but I don't seem to be able to figure out how to do that.  I see it on tons of other blogs, so I know it's possible, I just can't do it myself.  So if anyone out there reading this can give me some pointers, that would be great!  :)