How to get rid of this mindset?

Hello I’m 15F

First time I drank I was about 13, it was just a shot of whiskey.

Now from time to time I drink enough to get myself a bit drunk.

It is illegal for me to buy, but not illegal for me to drink.

Now problem is, my mental health has been worsening a lot and I started thinking about leaning on alcohol to stop thinking, to feel “good”.

Last time it happened was about two weeks ago.

I am genuinely scared of turning into an alcoholic, what do I do?