I set the breeding tank up the day I am planning to introduce the pair.. don't cycle or attempt, as with the multiple water changes needed, etc, it will just crash and kill all the fry. So I set mine up that day with fresh water, and then place the fish in the tank.
You move the fry from the breeding tank (as it's generally more ideal to breed them in a 10g or smaller) once they are at least 4 (I prefer closer to 6) weeks of age OR they are close to half an inch.. don't have a ruler here next to me to say what size exactly.. You can set up the grow out tank the day you move them if you wish.. or prior. Just know that at first you'll be doing more frequent/large water changes (as they get older it gets less frequent, such as every 3-4 days), so you will want to be careful about trying to cycle that as well. Some people have success with it, but those are people who have a lot of experience. I personally (if the tank is broken down) will set it up the day I transfer.. use some of the water from their fry tank for the transfer.
As for jarring.. you're going to want to wait until they are about 8 weeks.. depending upon size of course (sizes of fry growth changes greatly depending upon what you feed and water changes - feeding those micro worm cultures will result in slow growth vs BBS, etc).. I personally wait until they start to fight (not just flaring and eye balling each other, as they do play fight to learn), but once they are going after each other to hurt, or doing it nonstop - but I keep them in as long as possible so they get some body size on them, and once they are moved to the individual containers they will start to grow their fins out much more.