If you really want, and have completely thought through this, and have completely convinced yourself to do this, then get one. But my advice would be, wait it out. Wait until you're 18, when you've matured some more. You're 14? There's a lot of stupid phases that go on even through 14-18. So i'd wait til you're 18, because who know's, you may regret this in the end. Plus you still have more to grow, if you get it on your arm, and you end up growing a couple of more inches, the tattoo may stretch some bit and it will look worse. Completely your decision, find it on your own, not by what we are saying.
-Edit-
- Never go for a cheap tattoo.
- Always look for a good tattoo artist, watch his work, see how it's done.
- Get something meaningful, which i don't think at the age of 14 you really even are sure to something meaningful to your life. Like before you posted, you want to get MJ on your wrists or something... Come on.. in a few years you will not give a danm and regret it.
- Laser re-movement is very painful and will cost as much as your tattoo, and will most likely take more than once to remove.
- It'll look ridiculous when you get old, plus if you become fat, which i hope not, or very skinny, the tattoo is going to stretch like your skin, as i said before about you growing.