I want to get a Nabel Piercing except by myself.
But here's the thing: No matter how much I push, the needle whont go through my skin!
What's wrong? And is it OK 2 use a earring?

You should have it done by a professional. If you search this board you will see several questions about infected belly piercings.

The needle won't go through because you don't know how to do it, that's why you always get these things done by licensed piercer.

And "is it ok to use an earring"? Are you serious? They are called earrings because they go in your ears, not your bellybutton

If you continue to try and pierce yourself you are at high risk for infection, which means you are going to need to go to the doctor and get antibiotics, and depending on how severe it is (it'll be pretty severe if you use an earring) you will probably just have to take it out anyway.

Why are you trying to do it yourself? Your parents won't let you have it done? If that's the case then just wait until you are 18 and sign for yourself. If you do get infected and leave it untreated, you can injure yourself more than just in your piercing. Is that really worth piercing yourself?