Two of the questions aren't showing up for me, so I'll answer them here. They were about disabilities and apocalypse just so I remember.
Idala is probably my most obvious disabled character, because her whole world and backstory centers around being dyslexic in a world that has no word for it besides "stupid".
She handles this mostly with help from her friends, as there are no formal supports available to her. For reasons that are hilarious to me and only me, her patron deity is also active in our universe in the current time. He's the one that tells her the word dyslexia. She doesn't use it as a label because to her it's a meaningless one.
She's secretive about it because she considers it a weakness and is worried about enemies using it against her. She's also immensely ashamed of being illiterate. Her main coping method is a variety of spells that will functionally read things to her out loud and record what she says, but using them as constantly as she does causes chronic headaches.
Her romantic entanglement with a long-time friend actually comes from him, a diving healer, slowly attempting to deal with the chronic illnesses she's inflicted on herself while trying to operate like a neurotypical person.
I don't tend to write a lot of disabled main characters myself because I am not myself disabled, and I shy away from representing marginalized groups out of concern I'd either under or overplay it to an offensive degree. I do have some as non-POV characters, as it's still important to have representation where I can and I think it does some good for things like disabilities, race, and queer identities to be visible as just facts of life.
I did do some fanfics with a main character who was canonically quite autistic and I have to say doing the research on ARFID was probably my favourite part. Everyone was very kind, their discussions were so informative, and it really was just an incredibly wholesome, friendly thing.
To be honest there is unlikely to be an apocalypse anytime soon in my original work because the massively powerful Elder God who is the patron deity of the main characters would prevent it. He's the God of Chaos and he is *thriving* with how the group are breaking traditional norms and providing living examples of the benefits of forging your own path. He will, and has, burned down empires to protect them.
An absolute last option if he were somehow bested would probably be to spirit his favourite away to another world. Considering the group's go-to response to anything is "stand your ground", this would devastate all of them.
As for the fanfic project, it's actually set in a post-apocalypse!lite world! 50-80 years ago scientists from the mainland came over, fucked up the local area with their experiments, and were chased off by the locals. Now there's a new disease they can't treat on their own, so they call ONE SINGULAR chemist over to help. That's the main character, and a lot of the game progression is undoing both the environmental harm and the generational trauma the environmental harm caused.
It's interesting to write about because the townsfolk have very good, hard evidence that the main character is Not To Be Trusted, and working through that is actually the whole point. Writing about how the main character goes from an Enemy Of The People to just an actually likeable dude is a lot of fun.