New to fitness pal

Hello, My name is Jennie, and I am new here. I've never done this before so here goes. I've decided to make a lifestyle change. I went to my doctor yesterday and was told that if I don't have a low blood pressure reading next week that I am going on medication. I've struggled with my weight for as long as I can remember. I'm really hoping that this time is different. I'm tired of this game already. I just want to be healthy and happy.