Hi Jade!! If I were to talk to myself 50 pounds ago (at my highest weight after a huge regain), I would tell myself to CHILL OUT and start out slow. Having goals and being motivated is awesome, but you can't be a perfectionist at this. My motto now is consistency over perfection. I consistently eat better now. I consistently move more now. Do I follow my own good advice all the time? Heck no! But, I do more-so than I used to.
I started out counting calories and watching portion sizes. There's some great apps and websites out there that could help you with this. I think that gave me the clearest idea of proper portion sizing and better food choices.
I then switched to keeping calories in mind, but just trying to eat healthier. Less processed foods. Less carbs, more protein and veggies. I try to just listen to my body more and try to "flow." If I know I ate a little higher calorie the day before, I try to restrict a bit more the next day. If I know I am eating out one night, I try to not eat much during the day. This DOES NOT work for everyone, but with my busy lifestyle, it's the only way I can do this and stay sane.
Also, find some exercise that you love to do. I try to keep a fitness plan, but sometimes I don't always follow through. My big goal, however, is just to move more than I did at my highest weight and make fitness goals for myself.
Good luck! Can't wait to see you at 160.