Good on you Dave, wish you all the best...
I used to be my own Boss and I miss those days but I got frightened off with IR35. I console myself with having paid days off and the state of the contracting market.
If you're good though you won't have any problems finding work, I've been interviewing contractors for general IT support stuff and 80% of them haven't even lasted 10 minutes in the interview before I've sent them on their way because they obviously don't have the skills as presented in their CVs.
For example - did you know that a VPN means you can sit on the beach and access computers all over the world without having to log on to the internet ??????
Or perhaps, you would use a router for situations where you have lots of servers and if one fails the router will take over and pass the data onto a server that is still working ??????
Unfortunately that is the state of some of the supposedly "experienced " contractors out there - so you should have a head start on the competition.
Go for it