Hi Michael,
Yes, you will need to enable MFA so that you can continue to use Azure portal. One option is to use Microsoft Authenticator on your phone, which is free.
Please see article below for details. Also note that you can request to postpone enforcement until March 15, 2025 if you want (article describes how).
Prepare for multifactor authentication
Please click Accept Answer and upvote if the above was helpful.
Thanks.
-TP