Atheist tattoo?

[The Actual HolyMystic AM]

Where would be a good place to put a tattoo, not covered up by t-shirt , or anything else? (with the exception of long sleeve) upper part of body, not on back side, visible from a talking distance, preferably not on forehead

also thinking of: Secular Humanism, each word on my pointing, and middle finger (peace)
Also any recommened age (for fingers) to get the tattoo? 18 right now...