Recommend finding and talking a 1-2 hr local Medicare session. These guys are highly regulated by Medicare they can’t take a cup of coffee as a gift without getting in trouble. Key take away is, you are a rock star; untouchable, at age 65 - Medicare and supplemental HAVE to take you. After 6 mo, not so much. And you will PAY higher rates forever, for skipping months or years, down the road. Lastly, SOMEONE gets paid; the Ins Co, the Agent given these sessions, etc. You save nothing by going direct without them. So go and learn, and sign up on time.
I just bought my medigap policy through AMAC. The agent was the best salesperson I’ve ever dealt with in my life. She guided me through the entire Medicare maze and helped me make informed decisions. No membership was required and the commission goes to a good conservative cause.