Wotcha and welcome - currently going through exactly the same exercise with my 15yr old - Insurance is the issue - anything with a turbo will just be a no point exercise.
What we have found is the later sharkeye hatch 1.5r is either a 4 or 14 group dependant on who you are talking to so smaller engine UK model etc means you may be closer to getting cover at 17.
Only problem is at this point you are looking at about 4k for one but I imagine in 2 years time that may have dropped a little.
So between now and then spend teh time on the phone with brokers - online stuff will give you a start but a specialist is where you are likely to get something in place