A few months back,
a dad came here asking the same thing regarding his 20 year old boy. It was written in such a way that the responses on that thread beggared belief - in a good way. I don't know if something was in the water but a lot of professional and senior members gave up their time and wrote detailed responses at length.
The pprune link below is golden:
Family Member Advice
This thread looks at the approach to be a pilot, what it entails, market conditions, and what to expect once you are actuallyin the job. Getting your fATPL is actually the easy part!
My posts could not compete with the in-depth detail others gave. So I came at it from another angle.
That is your son could be the most intelligent guy in the world with 100% passes in ground school and in the air. But is he actually 'pilot material' to get a job - regardless of how many interviews he gets. This is as important and there is no way of testing this. Only you will know what kind of person your lad is from the type of posts I wrote.
Have a read.