Tattoo?

I’m 14 and I have an older brother who’s 27 and he had a bunch of tattoos and recently he talked with my mom about me getting a tattoo. And my mom is completely against tattoos. But I’m not. And I’m open to the idea. My brother knows a guy, idk what to do because my mom will be so mad at me if I get a tattoo, there is no way she will EVER agree to it. What do I do?