Unless you're trying to create a Russian dictionary with a target language other than English, you might want to consider registering your Kindle and downloading the Russian Abbyy dictionaries that all owners of registered Kindles can download for free.
The following dictionaries are available for download:
ABBYY Lingvo Большой Русско-Английский Словарь (Russian->English)
ABBYY Lingvo Большой Англо-Русский Словарь (English->Russian)
ABBYY Lingvo Большой Толковый Словарь Русского Языка (Russian<->Russian)
If you really want to create a dictionary from scratch, see
this post for a proof-of-concept dictionary.
For more information also see the
How to create your own mobipocket dictionary for any language thread.
FYI: Kindlegen is included in Kindle Previewer:
Windows:
%LOCALAPPDATA%\Amazon\Kindle Previewer 3\lib\fc\bin\kindlegen.exe
macOS:
/Applications/Kindle Previewer 3.app/Contents/lib/fc/bin/kindlegen