I would reach out to NVC to check. These are my dates for reference. I don't think a month is too long.
Timeline
13th May - DQ
29th July - IL
6th September - Interview
@Jumboeggs i had my interview a couple of weeks ago. They didn't even ask about my job. I think it's common to not have a job and my lawyer told me before it definitely wouldn't be a problem if they asked and I say I'm job hunting
I was interviewed last Friday. They told me I was qualified, just need to email them when the visa bulletin is released, then they will organise sending back my passport, and it will be issued October 1st.