Being a first timed driver and trying to get insurance below £1k as the main/only driver as said already is pretty much impossible. I started out in an old 1.2 corsa, even with my dad with a ncb of 10+years on my insurance it was £800 to learn in, the moment i passed this went up to £2100 which meant changing companies with my dad on the insurance and we managed to get that down to about £700. That's given the fact that i've never been in an accident, me or my dad have never made a claim in 10+years, low risk crime area, garaged car with good security and i'm at uni 90% of the time so only get to drive it in the rare event that i have hols it could be significantly worse.
Phone up a few companies and ask what the cheapest car to insure would be and ask for a quote. The smallest, oldest, cheapest car you can possibly get which can pass an mot is your best bet. My friend recommends the old 0.8 litre fiat cinqento (dodgy spelling but they look like metal coffins if you ever see one). Then again she is female so her insurance is naturally a few hundred cheaper.
Word of warning, pass plus 'can' only reduce your insurance by 30%. 30% is the max you can save with certain conditions. It all depends on who you are and what you drive. Personally there was little point in paying out however many hundred pounds for the lessons to save a couple of hundred on my insurance, which will naturally go down as my amount of driving increases.