Hey Tia.
There are plenty of resources on this site for you to take advantage of. My susggestions are:
take it slow (this won't happen in a day)
make a plan (what are you willing to do to make this happen)
pick a diet (you must implement a healthy diet in order for this to work)
be active! (even if it's a simple 20 min walk -- work your way up)
have fun! (who said this is fun?! ME! Make it fun. There are ENDLESS ways of staying active, follow your inner crazy active person)
Good luck!!