Using Outlook for Android in business environments for email and scheduling
Hi, Mahsa Bahar
Welcome to the Microsoft Community.
According to your description, you created a Microsoft account (adult), but when you logged in to the account, it showed that you were a minor. This is indeed a confusing problem.
Click the Microsoft account login page and click [Your information]. Check the year of your birth date.
If it shows 1994, it means that your account is an adult account.
You can check the content in this link to learn how to change your birth date.
How to change a birth date on a Microsoft account - Microsoft Support (English link, please use the translation tool to translate.)
Please let me know how you get on.
Best regards
Mia.W - MSFT | Microsoft Community Support Specialist