It's totally cool, welcome to the forums. The Slavic countries are organized by 3 groups;West, East and South.
West:Former East Germany, Chezh, Slovaks and Poland.
East:Russian, Belarusian, Ukraine
South: Balkans Peninsula becides Greece, Turkey and Albania.
Eastern Europe is heavily influenced by the Slavs genetically but some Slavic tribes settled in Western and Northern Europe also and the Wends settled in Danelaw and other places. Like other nations, Greeks are a combination of all of the civilizations that settled there; becides royal civilizations like the Norman's in England for example.
Anyways, Greeks are a combination of ancient Greek, Anatolian, Slavs and maybe Celts and Goths.
Russians the same thing, they are a mix of Slavic, Norse, Uralic and.maybe Tatar
If you have any questions, by all means please ask away. We'd love to hear from you
Are far as looks, it depends on the person. Perhaps, natural selection has drawn you closer to Eastern European folks than us Northern Europeans.