I agree with your dad about being wearing about linking cards. And you can't open a paypal account either.
You don't need a license. You need to hone your skills, you are 14 years old. Build games (lots of them) bad and good and learn from each experience. If you are serious about being a game developer, then start learning C# or C++, and you can learn these for free from microsoft(I'm currently doing it).
How to win dad's over isn't about showing numbers of what you can get. Dad's know life doesn't go according to plan. You need to study C#/C++/HTML5/CSS etc (all free on microsoft academy)
You need to use the free scirra license and make great little games.
Put your games all over the internet (Make sure it has your brand name - [NOT LightBulb Games (this is taken already by the way) your name, you as a person Naji ???], and get a domain name in your real name so that you can get an email which you will have for ever (can't be canceled no hotmail/gmail/webmail etc. And make sure that you can always be contacted via your games via email.
You are 14, you have 2 years to learn a language, and get your name all over the net. THen when you decide to take this up a notch, you have a following, and experience.