IMPORTANT: We have not started migrating any accounts yet. We’ll let you know in the launcher when your account is ready to be migrated. Never enter your account information on any third-party...
help.minecraft.net
" How do I migrate my Mojang account to a Microsoft account? Can I do it right now?
We have opened migration for a limited amount of players. We will let you know on your profile page on Minecraft.net and in the Minecraft launcher when your account is ready to be migrated. If you’ve been notified that you’re eligible, you can just click the announcement to migrate. "