Welcome Rebecca !!! You Can Do It :0) SP is a great website to help you get started. There are so many tools to help you step by step. I started out by logging what I eat daily, to see where I was. Then I started drinking water, 8 oz's a day because I wasn't much of a water drinker :0)
SP have great articles on every topic you could think of or ask. Good Luck and I'm here if you need support.