In seventh grade I took my first Spanish class and was taught the basic vocabulary and grammar of Spanish. I continued learning basic Spanish in school through my Sophomore year of high school.
Upon entering kindergarten I could communicate effectively in conversational english, however it was in school that I developed my use of 'academic language.'
I started being exposed to language when I was born. When in my mother stomach I'm sure I could hear noises, but this was probably the first day my brain was exposed to spoken language