Hi,
30, in my humble opinion, is not too old to start if you're prepared to:
- not have a specific goal in mind (e.g. Airline XX or Aircraft type XX)
- be prepared to be flexible in what you do, especially initially
- risk significantly reducing your income for at least a few years (if not many)
- meet some great people, and have some great times.
30's probably a good age, a good bit of life & work experience behind you, hopefully some idea of what you want from life.
I was 41 when I started in 2003, lots of folks told me what a complete pratt I was being (they still do, but for many other reasons.) After a couple of years in a very regional airline, I'm now flying a biz-jet and having an absolute ball.
Don't get old and wonder what it might have been like....