Here's a helpful guide to walk you through the process (see link below. Important Medicare Enrollment Dates & State Eligibility Information

Medicare enrollment and eligibility are not always simple to understand or navigate. Not only are there a lot of dates to remember, there are a lot of scenarios and eligibility requirements to consider. This guide helps explain all the different enrollment periods — and their tricky acronyms — as well the dates you should keep in mind and state-specific information you should consider when enrolling.

https://www.medicaresupplement.com/content/medicare-enrollment-dates