What foods are good for promoting natural weight loss?

Hi. I am in my 40's, 6'3" and about 270 pounds. I gave into depression and got fat partly because of dealing with the Covid-19 pandemic and crisis last year. I got lazy and ate a lot of junk.

I know I need to lose weight and exercise regularly. I have gotten so fat and heavy it's challenging getting down on the floor or ground and doing simple pushups. I am too fat and heavy to do simple jumping jacks.

I know I need to take better care of my health and be more concerned and conscientious about my diet and eating properly.

I was told losing weight is a priority because that will help alleviate pressure and stress in my back and joints. I had issues with my back, head, neck, legs and joints.

I need foods that are good for all the reasons given above. I know I should consult a physician and dietician/nutritionist regarding all of this but there is stuff I can be doing in the meantime until I am seen by them.

I need to buy healthier foods and stay away from foods high in sugar, salt and fat, and I can cut a lot of junk out of my diet. I need to stop buying certain foods out of habit and stop ordering delivery food so much.

I am concerned about my diet and nutrition and overall health. Almost every time I had gotten my blood pressure read by a blood pressure machine at my nearest local supermarket I kept getting readings that said "Stage 2 hypertension". I know that's not good.

Please help. Thank you