Thanks for posting your question in the Microsoft Q&A forum.
To ensure a smooth process, it's essential to completely disconnect your personal email from any Azure AD tenant or organization, including your previous workplace's Azure AD tenant. Get in touch with the IT administrators at your former workplace and request the full removal of your personal email from their Azure AD tenant. Once this disassociation is complete, you should be able to create a new Azure subscription without encountering any obstacles or access limitations.
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