30 yr old needing advice from the experienced

I currently have a stable full-time union job in retail. But I don't like the work and am determined to work towards becoming a red seal electrician. I'm considering looking for a labourer/helper job in the field. I have a little experience in the same role but it's a a little old(10 years) and I have a related college diploma for what that's worth that's equally old.

I currently live at home. One one hand I don't have to worry about homelessness so I can take risks. I would rather do that now than at 35 or 40.

On the other hand, I'm worried the economy is gonna enter an even worse state and I'll find even less work than what's usual for the cyclical nature of the trades.

I won't leave my current job unless I got an offer, my worries are with what happens if that works dries up in a few months and I'm sitting on my ass for a year+ with no work in the field.

Thanks for your input