I am a young person and I want to know what is the minimum age for Stack Overflow users, because if I type in my true age I don't want to be deleted or blocked from Stack Overflow due to my age.
You must be 13 to participate on the Stack Exchange network.
This is outlined in the Terms of Service, under the section titled "Access to the Service," which says:
Subscriber certifies to Stack Exchange that Subscriber is an individual (i.e., not a corporate entity) at least 13 years of age. No one under the age of 13 may provide any personal information to or on Stack Exchange (including, for example, a name, address, telephone number or email address).
While children under 13 can legally give out personal information with their parents' permission, many websites just disallow underage children from using their services due to the amount of work involved.
You are not allowed to provide your own personal information if you are under the age of 13 (most notably your email, which is needed to create an account). If your parent/guardian uses their personal information to set up an account for you, regardless of your age, then you can use the site.
See this related answer for more information