Confused 🤷‍♀️?

Okay I have a few questions that’s been on my mind do skinny girls get pregnant faster than like fat girls because I’m overweight but I’m like 303 pounds like my weight goes up and down so it’s like if I don’t eat anything my weight goes up and if I do eat something it goes up I’m not like 400 or like 500 pounds so I don’t know when I been trying to get pregnant I don’t get pregnant and I’m tracking my ovulation and everything and now I’m staying off my birth control pills but I’m going to try again and do u really have to have sex everyday? Just to get pregnant because I thought u can even get pregnant even when u ovulate that day? So can somebody please try to explain I’m confused