Need advice, do I continue or change my career?

I need advice, my current Carrer and has been for 10 years now is Refrigeration and Air Conditioning in the UK. I'm 30yrs old and I work nights and it's getting too much now.

For the past year and a half, I've been trying to become a sole trader doing drop shipping. I had a business selling Refrigeration equipment but it just didn't work. I've been constantly trying to make it work and find something to sell.

I've even considered to look towards day trading aswell, I've got a family of 2 daughters and a new home, I guess I just want to to escape the matrix or life and provide for my family and ultimately be more financially better off instead of living each month worrying about money. I make between 38-40k a year so not too bad but can be better.

Here's where I need help. I have a friend in Cyber Security and he's on alot more than myself. He's advised me there's jobs coming up which if I can build a basic knowledge of cyber security and learn for 2 or 3 months, there's a chance I could get the job.

It's already more than what I'm on, it's offering 45k starting and I know it's completely different to what I currently do for a job but it's something less physical on my body and genuinely sounds better to work for. I'm fed up up driving miles every day along the south of England up to the midlands.

My honest thought process/plan would be to train myself for 3 months, hopefully get the job and teach myself day trading for a side hustle, maybe even do it full time years down the line.

I just want people's opinions as I don't want to give up my dream of "leaving the matrix", I honestly don't think dropshipping is the way for me. I've tried so hard and it just isn't working.

Thanks for reading