How does a 12 yr old have to do to get better at singing?

Keep practicing. Practice makes perfect.

Get a voice coach... or lessons

Hi, babybri24!

Do you have music classes and/or a chorus or choir at your school?

Thanks!

No but I get on my lap top n sing my favorite songs

Hi again, babybri24!

If you do sing along and try to copy the way that people sing things on recordings that you have or hear, then the way that they sound may not be the way that your voice should sound. It would be best to be getting some help from a private voice teacher.

Do you go to a church of any kind?

I'm sorry to learn that you don't have opportunities for expressing yourself by singing in some way that's a program of some kind in school.

Thanks!

No

1) You need a voice coach. Perhaps someone will tutor you for free if they think you have enough talent.
2) Get your (or a) music teacher to give you some advice.
3) Join a local junior choir. Maybe at your local church?

Well you stop having sex at 12 with a boyfriend, * from other post where you though you could be pregnant,
** you stop being so concerned over boys

And you start doing what has to happen to be good and become the best.
1. you take lessons, voice, theory and perhaps a instrument actually all three would be best.
2. you get into choir at school and church ( or religious group of your choice)
3. you after this do things, with your parents sing in nursing home, sing in events and so on