When I was doing my CPL and instructor's rating, almost everybody I ran into was in their 30s, if not older. Most younger people don't have the money; they can't do it unless they've gone the military route or borrowed tens of thousands of pounds.
So the simple answer to your question is no, you're definitely not too old. But what
B Sousa says is also true. Of those people I met, not all now have jobs in the industry, and even less are making a decent living - or probably ever will, unless things change.