The main issue is sugar. People need to throw away the sugar bowl. then use agave syrup, xylitol and honey. add cinnamon to the honey where you can.

Cut out coca cola products completely - cut out diet and 'zero', too.

salt-wise: if you eats peanuts, rinse them first. Get all the salt off.
for home  cooking, use a tiny tiny tiny teenie sprnkle of pink salt AFTER cooking. Use a tiny bit of pink / sea salt at serving. It's so potent, u need only a tiny pinch, - also sage, thyme and parsley (and pepper) help. Season the food with fresh herbs n spices.

For fat: grill food rather than frying: eg plantain can be rilled. Shallow fry eggs in coconut oil. throw away your oil bottle. Use coconut oil or olive oil. Or ghee.
avocado is a good fatty food to eat. A geroge foreman grill is a great tool.

If your friends/partners don't support you on this...and they try to "go on...it's a treat...surely you can just this once." then they don't love you. Stick to your guns.