Seren - yes new to marathon running rather than running but many I think will be entirely new to running. And anyway marathon running is the sport I love don't think I have raced a different distance for a couple of years (apart from ultras)
The main tip is not to get carried away (we all do it) and do too much too soon. The plan is carefully structured to help you build up and avoid injury and to enjoy running for the long term. Trust it, follow it and you will have a blast.
You are hugely undertrained and it will be very painful if you already have a sharp shin type issue. Theres not a huge amount you can do with a week to go - rest etc of course - and if you are determined to do it then just hope you are lucky on day.