Weight loss

What kinds of exercises at home will help reduce belly fat? I would like to keep my booty, I plan on going to my local park to walk cause I don’t really want to spend money on a gym membership because I live in a small town and it’s a good drive away. I appreciate any help that’s given to me! Thank you. I would appreciate any dietary help as well if anybody could help, I eat pretty junky foods and sometimes have to take iron pills to help when I get my period cause it’s so bad, but thank you to anybody who helps.