I believe Mr Fyne got his first jet job at around 37.
No, you are not too old (although being Belgian may be a problem
)
When you say you can't get a job, do you just mean RHS on a shiny big jet or do you also mean, instructing, air-taxi, turboprops, bush flying, etc, etc?
PS I do have some sympathy with turning 30, I hated it, but trust me, you are not yet, in any way, old.