Turning 26, Citizen, Student Outside of US, What are My ObamaCare Options?

I will be 26 in June and off my parent’s health insurance. I’m currently unemployed and I am planning to start graduate school in Europe in September, so I will be here off my parent’s insurance from June 25 to September 1. If I am able to find a job until then, it will be a paid internship ($9.00/hr). When I checked the Obamacare eligibility, it stated I could qualify for Medicaid. Should I be applying for Obamacare given my circumstance or should I wait and apply for Medicaid in June? Thank you.