Hi Lizie - welcome to scrapbook.com. This is a great place to learn and share.
Where to start is a great question and difficult to answer.
My suggestion would be to start looking through the gallery to see how people are creating los. Also take a the free Learn to Scrapbook classes offered on this site. Go to the Classes tab and choose beginner.
Also the store offers a lot of ebooks that you might find helpful but I recommend the classes first.