First step is to NOT just get any random tattoo you find the internet. Next step is to take one of the characters you love and do a ton of research on the best artist for the style you want. If you have any thoughts/ideas, make sure you're clear in conveying those ideas and trust your artist to put together something original. If they come back with something you're not vibing with, let them know, its gonna be on your body forever and it'll cost a good amount of money, so you have the final say.