US Immigration from Colombia

My wife entered the US in September 2021, filed for AOS, EAD & AP in 12/2021. She was approved for the EAD & AP in 12/2022, still no AOS. I was wondering if my wife and I can do something for her Aunt and Uncle, who raised my wife, and a cousin that is pretty much a sibling. Her uncle is retired, the aunt is working as a teacher, and the one cousin is unemployed. It would be good if the aunt and uncle could get their tourist visas to come visit, and we'd like to bring her cousin, to help her with her future. What can be done?

The NVC sent me a case number and a invoice number but in the email it states that they will let me know when it is sent to the consulate. However when I check for the case it says that I need to do a DS-160 before the consular section process the case. Not sure if I should wait or fill out the application.

What career would you rather have from the following choices?

My wife is approaching her 3rd anniversary with her permanent resident card so she is applying for naturalization. She has short term memory issues well documented by neuropsychologist exam and neurologist testing. So I had the neurologist fill out form N-648 and it says she has impairments reading, speaking, and writing English plus limited ability to answer questions regarding US history and civics.

So my question is the applicant statement on N-400 says "I can read and understand English and I have read and understood every question and instruction on this application and my answer to every question". So she used a translator on the computer or my help if she doesn't understand a question, she did not utilize an interpreter. It seems a little counterintuitive to sign that statement yet submit form N-648 saying she has impairments with reading writing and speaking English. My thought is that signing the N-400 statement saying I can read and understand English means she understands the form but she can't necessarily pass an exam due to memory issues.

So is it OK to sign the N-400 applicant statement saying she can read and understand English in this case with her impairment? I'm thinking they would be understanding about her health issues

general waiver is for someone who has filed a petition in the past?