Hi and welcome. Never too late for the dream and I'd suggest you get some things in place while you're earning and can afford the outlay, or else start putting a little aside into an ISA or savings account for the holding equipment purchases. Maybe do a few day or weekend intro courses in areas you're interested in, be it crafts, preserves, cooking, animal keeping or chainsawing, get a feel for what you enjoy before you get to investing in the property. That way you've an idea what you are buying FOR rather than what you can do with what you've found, if that makes sense.
My two top purchases would be a good quality polytunnel and a couple of garden sheds, one for hens, one for equipment. Hens are a must, you'll never buy eggs again, but unless you have customers lined up don't get too many like I did, or you'll be sick of eggs and desperate for new ways to use them up
And a polytunnel will protect your plants from birds (including hens!) aswell as weather, and let you work in a sheltered environment with plants at the height you can work, raised beds and/or shelving, long term.
I'm only 48 but already restricted physically and having to make those kind of choices but could no longer afford to purchase a polytunnel or greenhouse and I bought a coop when I started with 4 hens, and should have bought a 6x4 or 8x6 garden shed as it'd be way easier to get in and clean let alone cover the expansion into the 20s of birds I now have! I used to run 4 veg beds and now focus on just one plus a few containers of things I would actually have to, but resent, spending money on - salad leaves being the most obvious as I couldn't bring myself to pay the cost of a bag of baby leaves having grown them myself! I don't waste time and energy on low cost items you can get in bulk eg tatties, too much digging when a sack from a local farm is pennies, tho I do put a couple in a container for new potatoes for the taste. I grow a few onions, leeks, runner beans (good picking height), beetroots (my favourite), courgettes, PSB, simple easy things after years of struggling to get mature caulis and cabbages I just know I'd need a tunnel and probably fail even then

Oh and I grew sprouts but don't like them so don't bother - grow what you want to eat most of and keep it simple, I'd say
Usually when someone is starting out I say get as much land as you possibly can

but in your situation I'd limit yourself to somewhere between 1.5-10 acres max, enough for a few sheep and ideally a place with a couple of fruit trees already in situ, otherwise go for a few of the patio dwarf types so you're not looking at pruning big trees in a few years. Definitely grow bush based berries - blueberries, blackcurrants, raspberries, whatever you enjoy - again they are relatively easy to manage and best fresh produce you'll grow. Strawberries are low to the ground and picking/managing them a pain on a bad back, so limit to pots in the tunnel for the long term
If you find the sheep work isn't for you in a few years, or indeed from day one while you decide/learn, you can let the ground to a local farmer for grazing between March-October and in return he'll keep it fenced and tidy plus be a regular visitor - as you get less adventurous someone coming by on a regular basis that will pass the time of day becomes a valuable resource, especially someone that can lend a hand with physical things or perhaps send one of the lads over. Meantime you can learn a lot about sheepkeeping from him and maybe keep a wee paddock aside for a few sheep yourself, but you could probably get the fleeces from his rather than put in the work for your own and still enjoy them being there
I wouldn't get yourself into anything requiring milking or complex care or physically demanding management - I'm a bit trapped in that regard but if I were starting out now I'd do it differently, wouldn't we all!
Oh, you could also volunteer to help out a couple of your local smallholder neighbours wherever you are now - usually much appreciated and a great way to make friends, learn the ropes and gain skills before you choose your holding. You could negotiate use of a veg bed or greenhouse in return for labour/skills you have and get used to the barter system as a way of getting things done on a low income too, it's invaluable!