Hey, I'm so sorry you're going through it and i wish I could help more but i myself hide my scars so i have a few tips
1) if they're healed just put on concealer on it
2) also if they're healed you can draw over then with a pen or a marker ( just draw some cute designs you find on Pinterest or think of your own, no one would probably ask what you're hiding under it)
3) if you have them on your arms wear a lot of bracelets stacked together one on top of the other
3) if you have them on your arms wear a lot of bracelets stacked together one on top of the other
4) long sleeves
5) arm/leg warmers since where I'm from it's still cold so no one will question it
Also ik you're religious and all but i honesty don't think a possible sin of religion should be the thing keeping you alive. I'm not religious in any way so excuse me if I'm insensitive but i think you should find things that would make you happy, things that could be your escape from it all for example mine are music and delicious food (it makes me feel better) i hope everything will sort out for you :D