Pill Advice

I took the pill before, but my boyfriend and I at the time still used condoms, and never had one break. Fast forward a couple years, I am now getting back on the pill because my current boyfriend and I are only using withdrawal as a bith control method. I know how it works, I know to wait a week after starting before not using another method and to take it every day at the same time. But I am still a little nervous about only using the pill. I'm wondering how much of a gap there is between times you can take it. I'm currently taking mine at 9am, but if I were to take it between 8-10am, does that make my chances of getting pregnant higher? And just any advice anyone has to ease my mind about it would be greatly appreciated, thank you!