What should i do? Please help!?

well i asked this question yesterday but i wanna rephrase it. Well im about to be 18yrs old. im an american citizen born here in Ca. i have my pport. My dad was born here in Ca too. My mom was born in mexico but came when she was a little girl and now became an american citizen. Well i plan on moving to mexico and permanently residing theyre and working theyre. All my family is over there and i like it theyre. They said its ok for me to stay in theyre household. i understand im going to get paid much less but anyways wat am i supposed to do? do i just go over theyre? or do i have to have a visa? thanks