I took a redundancy in November last year.
I was fortunate that it was a fair whack of money. I'm an electrician and have considered my own business too.

The things I have considered are:
Do I have enough money to support my family if I start my own business?
Is the market favourable to me if I take the money and look for another job or start a business?
What am I going to do with the money if I take it?

I don't know your full situation but I would still say go for it!
You will always wonder if you don't do it.
What's the worst that could happen?

I think most peoples fear is that they will loose everything they own. So what, they're just possessions, you can buy other stuff later.
If you can just learn to let go of the things you own, so that they don't own you, you will find the freedom and courage to do what you want and maybe chase your dream.

Go for it mate. Reach out and take your future with both hands.