Healing of skin can take a good while. Sounds more like a psychological issue than physical though? Just an assumption.
If it doesn't hurt then it's about using different ointments to speed up the healing process.
One thing; I burned my glans with an infrared bulb years ago and now there's no visible scar anymore. So while it can take a while with the healing, don't worry about it too much.
You can use shea butter, Nigella Sativa oil, etc.etc..
Best of gains to you, don't let this incident bring you down too much. Many Brothers do hit a bump during their journey toward gains.