Pre eclampsia

Hi all, I am wanting to get pregnant in the next year or so but I see so many stories on women getting pre-eclampsia and I am currently considered “obese” according to my BMI weight even though I don’t even look obese. I don’t eat the healthiest & I haven’t been to a Dr in a while so idk where my BP is or any of that good stuff :)

What are some things I can do / eat that will keep me in a healthy BMI / BP?