I am German and now I live in Europe. I entered United States on December 5th of 2013 under the Visa Waiver Program/ESTA that allows you to remain in the US for 3 months as a tourist. I overstayed, remaining the US for more than 3 years, until January of 2016. I got married there on January 3, 2016, and left the country four days later. My husband is a US citizen. 

Now I want to immigrate. I want to go back to study or work (get a Green Card). If that is too complicated, I would rather just go to study. 

How and what can I do to emigrate?