Having been there a few years ago, I certainly don't remember it being particularly dangerous. However, it is the Third World, so perhaps not what you are used to dealing with.
Even a few words of Russian will be helpful as will knowing the Cyrillic alphabet. Both Kyrgyz and Russian are written in Cyrillic. English is not widely known and restaurants rarely have English menus, although the younger generation might have a poor familiarity with it.
If you do read Russian, Anton Krotov's Akademiia volnykh puteshestvii book "Sredniaia Aziia" is perhaps the best out there for minute and up to date information.
Lonely Planet's "Central Asia" includes coverage of Kyrgyzstan and is certainly the best thing I know of in English about the -stans.
If you're looking for someone to help with guides, both Advantours (advantour.com) and OrexCA (orexca.com) can help you locate local guides, book hotels and airport transfers as well as travel to Lake Issyk-Kul or out into the mountains. As far as things to see: Issyk-Kul, the market, the former Lenin Museum.