US Immigration from Namibia

Hi July 2020 filers. I filed online from Arizona for our daughter 17 years (N-600) and myself (N-400) after 3 1/2 years of being here on CR-1 & CR-2 Visa. We filed July 25 and the N-400 NoA received online same day but my estimation of case conclusion is 8/2021, my daughter's came on July 28th and showing that her case is in process already. As I have been reading on Visa Journey forum, I am having hard time knowing the difference between N-600 & N-400. I think I read some people filed N-400 for minors which left me brainless. I am totally confused now, but thanks to my husband: everything is done though.

Are you guys practicing for US Civic Test? How is it going? I downloaded an App (US Citizenship Test 2020) on my phone which is really helpful to study for Civic Test, just in case someone would like this helpful. Good luck everyone!!!!!