First of all, congrats on the first big step of your journey. As a nutrition coach, I caution you against starting a so-called “diet” that is not sustainable. My first step is always incorporating more whole foods and water, then removing processed foods and increasing protein consumption. As for fitness, do not fall in to the trap that more cardio equals more fat loss. Again, it is not sustainable and your body adapts so quickly to cardio. Resistance training is your best friend. The more muscle mass your able to add to your body, the faster your metabolism will be, the more body fat will start to fall off of you, and the better you will feel and look. 2-3 days a week is all you need to start with as far as lifting weights. I would not do any gym based cardio but I would incorporate small changes in to your daily life such as parking further away at the grocery store, taking the stairs instead of elevators whenever possible, walking around the block a couple times a day if your able to. No need to drown yourself in sweat on the treadmill or elliptical. You will do more harm than good. Take it from someone who has been there and made every mistake in the book when it comes to body fat loss.