welcome Amber, taking control of your health and fitness is the best thing you can do for yourself and family. It's not always going to be an easy road, so stay focus and keep pushing forward. You will be amazed at how much energy you'll have when the weight starts to come off. That alone will help you keep pushing.
The good thing is that you are still young. Your body will probably react better to the changes than someone older. Set some mini, short term goals but keep the mindset that this is a long term deal and you're in it for the long haul.