Potty training ?!

Jordan • Married 💍 boy mom 💙 second boy due oct 2020 🥰

My son will be 2 in January and I'm sick and tired of buying diapers ! He tells me when he poops , and will take off his diaper if hes peed. I just need to know where to begin ? Can I just use the big potty automatically or would it be easier to use a little potty? Underwear or naked ? Help meeeeee