Dragons aren't born. They just exist. There aren't any female dragons because they don't reproduce so having a baby Dragon or a cave of eggs is lore breaking.
Dragon Priest masks were given to their loyal allies as a gift that is why they are special.
Dragon Priests were known for their cruelty so finding one to chat with would be very difficult since they probably would try to kill you.
Why jewel tipped arrows?
There is a dragonborn in Sovengarde but that is as close as you can get, I don't know what they would tell you if you did meet one.
there are some 'nice' dragon priests
the ones we meet are skyrim priests from the time of alduins dictatorship period of time
they were all pretty much d-bags
but its said that the preivous d priests in atmora were far more honorable and actually did their jobs well
very strict and were equal to kings, but not like the priests of skyrim