Can't find your photo album so I can't really comment on that.
Anyways, not to be an influence but you will probably be competing with people who are already "on". I don't really see a huge difference between 19 and 21. I didn't start cycling until I was 26 or so. Not saying that is the perfect number, just saying waiting an extra 2 years isn't going to do much in regards of messing yourself up.
Either start now, or way later down the road...
21 is the legal age for drinking and gambling. Don't get stuck on that number.
Some people don't even start till they're 30+