What's the best birth control?

Michelle
Me and my boyfriend have sex a lot (I mean what young couple doesn't just being honest lol)  while we do use condoms it's gets rather expensive. We're not ready for a baby so I started looking into birth control and there is just soooo many options. I wana know which type of birth control was most effective for you and if you had any side affects? Thanks for reading and for your opinions. :))