Anyone into Genealgy ?

Ive been working on my family tree the last few days and have hit a dead end. Once I get to mt great grandparents the clues have pretty much dried up. This is the point were they came to America and finding info on people from Czech isnt easy. I didnt find info on Ellis Islands web site about my who I believe were my Grandmothers parents. My Grand fathers parents are a bit trickier.

Im 99% sure that Ive found correct info on my fathers-mothers parents but I cant 100% nail down his fathers parents. Ive been told a few stories about the last name in the past including changed spelling (possible Hrushka or Ruszka) or that the name was made up so they would fit in the Czech area of NYC were they lived. I found my great grandmothers name as Lizzie Rushka, No info at Ellis Island but I found a Erzebet Ruszka that fits the time frame. She listed as being married but I couldnt find info on her husband.

I found my great grandfathers name as Harry Rushka on a US cencus from 1920, It list Lizzy Rushka as the souse and my grandfather Alex (confirmed) and his brother Paul (confirmed) But thats all Ive found of Harry Rushka. The Cenus lists Lizzie as being born in Czech and Harry as being born on Greece. I havent found anything about Rushkas being in Greece at all so its possible his last name was different and they used her name when they got here.

Thats about all I could dig up. I did all of this without using ancestry.com because I just cant afford it right now. This is just as addicting as cars. I started looking around 10am yesterday and finally gave up as 11pm.