How to stop eating junk food and sweets?

I eat too much junk and sweets everyday at least 1 or 2 things each day does anyone have any tips? I hate being fat, I never thought I would be 200 lbs at one point I’m exercising often now but healthy eating is hard for me because my family always has junk food snacks accesible and I need to work on resisting them. Thanks for any tips to quit this habit and finally take my health seriously, my wellbeing emotionally/ physically and lose weight.