As a fat dude who isn't as fat as I used to be:
Make the veggies a minimum amount rather than as much as you want. Like, eat a couple servings of whatever vegetable each meal minimum. Season it with seasonings. If you aren't hungry for broccoli, you aren't hungry.* If you really don't have a clue how to cook, buy frozen steam in bag vegetables and just do what the directions on the package say to do.
Don't drink any calories. I think that was probably beaten to death over the last couple of posts, but liquids aren't filling.
Use salsas or something to liven up the chicken or beef or whatever if you have to. Nothing sugary or fatty. If you like mustard, use mustard. If you like garlic, use garlic. Try not to accidentally dump a pound of cheese or mayonnaise or on your chicken.
Have a cheat meal no more than once every six months or so. Cheat meals make it harder. You wouldn't try to cut down on nicotine by chain smoking for a couple hours once a week. That would work against your goal and make it harder after your cheat was over. If you need a reward, make it something that is not food.
Find **** to do that is not compatible with eating. You have known you your entire life, so you should have some ideas of what activities outside of eating that you enjoy doing.
And, for your amusement:
https://youtu.be/1NjTWvl8x-U
*Not sure who first said that, but it is a good way to think.