Apprenticeship at 38. Am I insane?

Turned 38 this month and I just have this nagging feeling for a while I want to make a career change.

I dropped out of school when I was 17 and started a carpentry apprenticeship, after 6 months I went back and finished the leaving cert as my mother begged me to. Went on and did a degree in automobile engineering, spent a couple years in the motor industry various roles and left, money was shit and I hated it. Took a delivery/sales job with a small office supplies company, fast forward to now I'm a director of the company. I've enjoyed it but lately I'm completely burned out and see no real future in it for me.

My big regret I have in life is not staying at the apprenticeship, I've always been excellent with my hands and physical work. At 38 I still feel I'm young enough to go back and do a craft trade.

I have wife and kids, no mortgage house was inherited, decent savings so I'd be ok to weather the massive financial drop for a few years.

I'm just fucking terrified to make the jump, I'll be leaving a decent paid job and I'm so long at it, it's all I know.

Anyone else done something like this at similar age?

Edit: just to add I don't want to do a carpentry trade, far too taxing on the body, multiple chippy friends are in bits from it already.