Think about what your weight is holding you back from at the moment and go for it. Buy a pair of jeans that you'll be able to wear once you hit your goal weight. Good luck!
Try to find workouts you love. Personally I love small group classes because it's easier to work out with other people to motivate you. I love cardio kickboxing and recommend it to everyone because it's incredibly fun and easy to pick up. Hot yoga is great too. Gl :-) and don't get down on yourself, you look great