The general guideline is to try within 6 months of a lap op - because ideally you want to try and prevent endo growing again and causing a fresh batch of adhesions. So after an you have recovered from the surgery (a few weeks) then it is the best time to try.
Having said that, if you are not in a stable position to have one yet - financially, emotionally, physically etc then don't have one just out of fear that it will be your last chance.
That is not a good enough excuse. You need to be in the best possible shape to contemplate motherhood. It is hard enough to cope with for healthy mums - and can be a real struggle when you also have a long term chronic illness too.
You will need support from aunts and grandmas at times so if you don't live near extended family at the moment then that is also an issue to think about.
If you are not yet ready then you must take steps to reduce the risk of endo returning by reducing or stopping your periods so there is little or no risk of endo spreading from backflow of menstrual tissue and bleeds along the fallopian tubes.
Back to back BC pills or mirena coil can both help with this.
Find out from the surgeon where the endo was found. because that too can have a bearing on the situation. if it was nowhere near threatening your tubes or ovaries then you have less of a threat to future fertility. for example the endo may hve been on the peritoneum or appendix or bowel and no where near preventing the safe journey of an ova to the uterus.
If the endo was on or next to ovary or tubes then was it only on one side or both?
Again this gives you some measure of how threatening the endo is to your future chances if it does regrow in the same location because they didn't remove a deep endo lesions only taking the top layers back.
Forthe time bing though - concentrate on recovery from the op. Then your follow up appointment with the gynae to find out where the endo was located and discuss what measures you want to take to reduce your periods while you ponder on trying for a baby.