So if I initiate a conflict and then decide I made a mistake, I can then shoot the person I attacked if they don't back off as well?
Only if their actions are putting your life in danger.
Stand your ground doesn't let you shoot anyone who attacks you, it just says you don't have to retreat before fighting back.
If I were to walk up to you and punch you in the nose, but then find out you're a much better fighter than me, and clearly try to stop the fight.
Your right to self defense has ended. I am no longer a threat to you.
If you continue to attack me, you have become the aggressor, and after retreating as far as I can, I now have the right to use force to defend myself.
Even then I can't just shoot you. Your actions have to make me feel I'm about to be killed before I can use deadly force.