USA, Canada / U.S. Citizenship Thru Marriage? [3]

Hello
I came here from poland when i was 12 years old with my parents, we overstayed our visa and became illegal,
I recently got married to a U.S Citizen we have been together for 4 years and I would like to start filling out papers for my citizenship.

If anyone has gone thru this process please let me know how it works.
Thank you!