Book your place and Dave will send you a book ! read the book read it again and again untill you go on the course .
Practice your shooting prone,kneeling and standing off sticks.
Then attend the course and Dave Strettons team will guide you through your level 1, they are a great bunch. But unfortunately i could not spare the time to attend the full course and just did my assesment there, and had a great day in good company.
I suppose good luck should come next BUT if you put the time and effort in you will pass.