I belive you are a Jedi before you even realize it. According to one of the Apprentice books, the baby is tested at birth and taken when they are very young. Then they are brought up in the Temple to learn how to be a Jedi. So if you are to become a Jedi, that is a way to do it. In Anikans(please ignore the spelling) case, he wasn’t found until Qui-Gon found him. There are special case instances, where a Jedi’s abilites aren’t seen until much later on in life.