as a fellow big girly (starting at 226 lbs at 4’10) i recommend eating lots of protein! having protein heavy foods can help you feel fuller (as well as drinking lots more water). grilled chicken, and ground beef are things i started eating a lot more alongside cheddar cheese, vanilla protein shakes, and protein bars with dark chocolate. beans are good protein too! and remember not to go COMPLETELY into a brand new diet as that will just make u want to crash and give up.
Set a very strict no-snacking rule for yourself - everything you eat, you eat during one of the three meal times. Plan your meals out in advance with what you know you’ll need, not what you want in the moment. Make every meal consist of a straightforward primary-protein entree, complex (or at least not just straight sugar) carb side, and fruits/veggies. Just about any exercise is good, so long as it genuinely tires you out (ie consumes energy), cardio is best for quicker calorie burning, but