Is there anybody out there????!!!

I love learning about blogging and I feel so proud when I learn how to set up something new... but I'm stuck! I've managed to upload one of my photos to appear behind my title but how on earth to you shrink it too a narrow band rather than it take up half the page...I've tried to goggle instructions but my poor brain is boggled. So..I just wondered if you have had this experience and could leave me a comment and a tip??? I would really appreciate it x