That sucks, man. Good luck with the therapy. I hope you regain full use of your hand again. This brings back some painful memories for me.
19 years ago I bypassed a safety feature (gloves) because I was an idiot and ended up with some 2nd and 3rd degree burns on about 20% of my right hand due to a molten sulfur splash. Don't have any photos but the healing was extremely painful. Most of the scarring is no longer visible but the nerve damage is still there. Some muscle still twitches non-stop. It's fucking annoying.
I've heard a lot of these stories.
My boss has a gnarly scar over half his right arm from boiling hot caustic rupturing from a high pressure line as he walked past.
Makes you think twice when you get to the accidental death and dismemberment portion of your benefits.