Career path and moving forward

I want to take extensive education in Plumbing and Electrical qualifications, Gas engineering, and renewable energy. Lift engineering among others, then eventually move from UK to Singapore to do a open university open degree in biology and chemistry paid via my wages. I don't see the point of staying in the UK anymore. I want to move out of the UK to achieve my dreams and ambitions and feel more emotionally fulfilled in myself.

If the ambition is to leave the UK& head for a high tech, emerging market I would strongly make sure you understand the VISA requirements & what training & expertise you need to settle abroad. I imagine Singapore would prioritise quite stringent requirements.

It might be easier / better to focus on one or two of "Plumbing and Electrical qualifications, Gas engineering, and renewable energy. Lift engineering among others", especially if your plan is for "extensive education" in each.
How long do you expect "extensive education" in one area to take? Multiply that by the (at least) five areas you want to cover, and might be a long time before you're in a position to start earning from that education.

It would be 1 year for the plumbing and then 4 years after that to do the electrician apprenticeship after that another 3 years on top so we are talking 8 years in total.