Healthy or Die

I want to start eating healthy , but it seems like I can't even scarf down two fork full of salad without loosing my appetite, people make it seem so easy to eat healthy and drink kale and what not...if I stop eating candy or any types of junk food my body goes into a depression withdrawn mood plus junk food are way cheaper then a mixed bowel of fruits ..  How did you guys give up the junk food and jumped on the healthy train ? Tips ? Advice ? Stories ?