I was already preparing for the second level at that time, so I didn't really study for it, except for looking through an example test ( http://www.testrf.ru/pdf/1ser.pdf ) Something like this book: http://www.ozon.ru/context/detail/id/1076060/ , with lots of example tests, would be helpful if you need more practice.
Signing up for a a few lessons to prepare with a Russian teacher who is familiar with the test and the grading standards is the best option, in my opinion.
Good luck![]()