I-130 - either way of doing the dates is fine
I-485
1) Temporary Worker
2) No
3) No. I wouldn't bother adding the J1 paperwork
Not sure about the other forms
My wife naturalized in November, 2023. January 2024 submitted the I-130s for her siblings (which will take forever). Now working on I-130 for her mother. For some naturalization is the end... for others only the beginning. 🤪