Hello DivaShane,
I would suggest starting
here and progressing further through the Codex chapters. This is assuming you are knowledgeable in basic HTML and PHP.
If you do not know what the WP post loop is and how its basics work, then you're best off starting with:
http://codex.wordpress.org/Blog_Design_and_Layout and working your way up.
Let me know if you need any help.