Realms in Minecraft?

So I wanted to go to a realm of my friends in MInecraft but when I clicked on realms I got this:

Then I clicked Update account and then you have to somehow confirm that you're an adult by entering the information on his credit card and then why always have to pay 10 cents. My problem is that my parents do not want to buy for 10 cents and therefore I wanted to ask if I can somehow play differently in realms.

Oh no! Typical error while creating game accounts! Always pretend that you are grown up! When you have entered your real date of birth, you must wait until you are 18.

I do not know how to solve the problem.