Moving to Japan as a SSW welder, does my plan hold up?

Hey everyone, looking for insights from others who have gone through the SSW visa process, especially in the shipbuilding field.

My situation:
I'm a 20-year-old Canadian citizen dropping out of aerospace engineering to enter the trades. Yes, Yes, I know… this degree will help me a lot in the process, but it's just not viable for me, nor is any other degree due to circumstances. I can speak some Japanese and can pass the N4 with some studying, maybe the N3 after a few months. I have zero experience in the trades. My last two internships were in logistics sales and chemical sales. My goal is to move to Japan ASAP and settle there, aiming for eventual permanent residence.

This is the plan I've landed on:
1. Spend 6 months to 1 year getting my CWB welding certifications in Ontario
2. Work a welding position in Canada for 1-2 years to gain experience and save money while living with parents.
3. Pass the SSW Japanese and skills tests. Specifically, the welding category of the Shipbuilding field, as I heard those are in most demand, but I am willing to test for the Manufacturing or Construction fields as well to keep my options open.
4. Apply to Japanese employers from Canada, if no luck after a few months, enter on a Working Holiday Visa and job search like my life depends on it. Find something part time to sustain me until then.
5. Secure a position and get either a COE or transfer my status from WHV to SSW1

Some questions:
1. Is the Working Holiday Visa to SSW status change doable? I know they're hesitant on that kinda stuff. Wondering if anyone has attempted it.
2. Any RSOs, recruitment services, or agencies worth trying for Canadians applicants?
3. Whats the shipbuilding industry like? Any companies that are foreigner-friendly? What are the wages and progression like? Is manufacturing or construction better for my situation?
4. Am I completely out of my mind? Is this a horrible plan?

I understand I'm sacrificing perfectly good career opportunities in Canada and I'm going to STRUGGLE. But I just want to move to Japan for my own reasons, work hard enough to get by, grow my career there over time. etc.

Sorry for so much info and questions. I appreciate anyone who takes the time to reply and help me out. Thank you.

by Jenji_