I would say it’s never too late to try something different. Life is not a dress rehearsal, so if you are miserable change your life.
The main blockers for something like this are usually responsibility i.e. kids, wife, sick parents etc.
If you have nothing of these then its down to you old boy!
If you have a trade it can take you places, if you want it too.
I am 39 and hopefully I will have moved my life to Canada within the next few months.
Change your life, you will feel much better
Just as a foot note
I had a friend who was an average student at school, bummed around doing shitty little jobs so he could finish college, as he wanted to be a policeman.
He tried several times to get in and was so fit for the tests he could have joined the army!
Sadly because he didn’t fit the ethnic demographic at the time, he was refused for the final time.
Devastated his head disappeared up his arse for 6 months.
When his head reappeared, I asked him “What now?â€
He replied, “Promise you won’t laugh?â€
“No, of course notâ€, I said
“Spaceman, I want to go in to spaceâ€
At this point, naturally I thought, that’s it, his tiny mind is broken, but being supportive I said “great go for it!â€
Long story short, he packed his bags and trotted off to Bristol University
He still hasn’t quite made it in to space but has a lot to do with it.
I am extremly proud of him, it was a bold move that really paid off
http://www.physics.bristol.ac.uk/people/laing_a/index.html