There's been some sound advice already given so I'll just add my two-penneth.
I was in a similar position to the OP about 10 years ago, albeit with a couple of slight differences; I've always been self-employed so the career change was largely self-inflicted, and I did have some background in woodworking having started as an apprentice joiner after leaving school in the seventies; I was also 'only' forty at the time. That said, I think you (the OP) needs to decide what type of woodworking you want to do; are you 'chasing a dream' of fine furniture making, or do you need to make a living because the mortgage has to be paid and the kids need shoes?
If you're chasing a dream, then I can't help you (sounds like more the sort of thing you should have done as a hobby when you had a job, frankly) but if you have to start earning a crust then I'll agree wholeheartedly with BradNaylor about getting yourself out there now as a self-employed carpenter/handyman and grow a business from nothing - it's what I did. You sound like a competant DIY-er, so why would you want to earn peanuts as an apprentice? My cleaners grandson (a tenuous anecdotal relationship if ever there was one!) earns a statutory £95 per week (a week!) as an apprentice joiner to a local firm who, frankly, don't have enough work to keep him occupied, let alone learning. Could you live on £400 pcm, gross, for as long as it takes? Neither could I.
As Brad says, there's an almost inexhaustible supply of people who need things doing, whether it's flat-pack assembly, blinds and curtain-track fixing, or just a bloke with a long ladder for half an hour, there's always lots to be done; if you can string a sentence together in English, return a phone-call and turn up on time then it could be you who's doing it. And don't be sniffy about these small jobs - as well as being a quick and easy earner, they're often a very useful way of introducing yourself to a new client; people often like to try you out on something small before entrusting you with something larger.
If this is the route you want to take then I'd be happy to share my experiences and advise accordingly, either publicly here or through a PM; website's in my sig if you want to take a look.
Final thing; there's probably 30-times as many carpentry/handyman outfits offering their services now compared to when I started out, so it might be worth doing a quick Google or Yell.com search just to see who's operating in your area.
Hope this helps.
Cheers, and good luck
Pete