Gee Baba, layman's speak is "good news".
I don't know how they assessed you before the operation, but assuming you were already Gleason 7 from the biopsy they didn't find anything more threatening. And as far as they can possibly tell, they got it all out.
As Tech Guy says, no one can ever be 100% certain there isn't a very small amount of cancer left in you somewhere - but with your results anything that exists and starts growing will quickly be detected from PSA measurements. And something can be done about it.
Could you have waited longer? Well if you had, and the equivalent report said "positive margin" you would have regretted it. It isn't the sort of thing to gamble with.
How are you doing? At 8 months you probably get some sense of how you are recovering the functions that get knocked about a bit by surgery.