First, I encourage you to heavily research any diet tips you get here, including mine. However- my suggestion would be to look into the Primal Blueprint/Paleo approach, and even consider Keto. Please check out the website
MarksDailyApple, Mark Sisson is the founder of the Primal Blueprint approach (it's a variant of Paleo) and he has a brand new book out (and many recent blog posts) about Keto. I suggest this not only because a lower carb approach is very effective at causing fat loss, but also because modifying your diet to completely eschew processed foods and to reduce carbs also has a marked positive effect on anxiety, depression and other mental illnesses.
Lastly- WELCOME to 3FC! I hope you find an approach here that will work for you, and I know you will find supportive people here and that can really help.