Personally I don't think 26 is too old for anything appearance related you could think of!
& I say go for it. It's not like a tattoo that you're stuck with forever, piercings can always be removed and usually heal up with time.
I'm 32 & I have snake bite double lip piercings and I'm thinking of getting a septum or my nostril re-done.
My "aunt & uncle" (not blood related) are in their 50s and they are old school punk & rock fans, still wearing all black with their piercings and tatts and leather jackets. They don't look ridiculous either, their style is such a part of them and their personality that it works.