Amazon is a platform for product placement with stores, very few stores Amazon ship the item to Russia, normally it is sometimes easier to find the product on ebay.
Choose shipping or USPS Air mail — regular mail, or Prioriti — Express or Express, EMS, Express, do not select, there will be problems.
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ZIP index, State — state, not necessary to write Province — oblast (Moscow region or something like this), Address Line — the address (Moscow, Pionerskaya str-24a-7), though the city is usually a separate field.
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The address you write to our mail, write so they read the English letters and knew where to go.