I read a LOT of threads before deciding to start pairing and the overall consensus is that there is not much to lose by simply pairing the snakes together if she's over a year old and over 1000 grams. Whether or not you get eggs is another story.
I think most would say 17-18 months old and over 1200 grams and eating.
I know a few do it that early, but honestly 1 year old is too young and 1000 grams is pretty small, too small imo.