Korean man say to those prices: HO LEE PHUK
Find yourself a day with a decent TDO (personally I use Bookatrack, Johnny and the guys there are incredibly welcoming but don't take any mucking around) and go to a circuit with plenty of run-off, somewhere like Anglesey is absolute perfect and is one of the best tracks in the UK. Take it slow and steady, listen to the briefing and keep an eye on your mirrors for faster cars, and you will have nothing to worry about. You can hire an instructor if you want for £30 for 30 mins which is more than enough to teach you the lines and smooth you out.
If you're drifting a lot on an abrasive airfield you could well kill tyres quickly, but smooth driving on a proper track isn't likely to give any real noticeable tyre wear across the middle, although you will probably wear the shoulders a tad more. A stock Zed will be fine on track, just remember not to do any more than about 20 mins max out there and then take a 30 min rest before going out again.
My first time was terrifying for the first hour, then it all clicked and it was nothing short of incredible. By the end of the day I was overtaking significantly more powerful machinery, but also getting passed by some complete nails! It really isn't anything to panic about, and you shouldn't be afraid to push the car harder as that's the whole idea of trackdays, but if you are particularly bothered then track day insurance is available.