Question about a potential story (Patreon)

So, I've been thinking about a couple story ideas over the last few weeks, and one's keeps coming back up. Something that's out of character for me and my stories, an isakai story.

I usually don't like to embrace tropes in my stories that much, but this idea just felt fun to me.

I tried to write the first chapter, a snippit, earlier today and couldn't figure out where to start it, so I plunked down the premise to try and sort things out in my head. It didn't work, but while I was working on it I had a chat with a couple friends, and they gave me a really good idea for the first chapter/introduction.

So, my question to you all would be: If I started writing this occationally, would you be interested? I'm not 100% happy with the premise so far... one of the most important events in the story is supposed to be the MC loosing her magic core (or whatever I plan to call it) and figuring out how to cast with it being completely crippled. I want to completely remove/rewrite the last paragraph to make that more clear, but I'm jsut not sure how to do that yet.

Anyways, without further ado...

The margrave's manaless mage

Premise:

When she was young Lana Hughes often dreamed of being swept away to a fantasy world where she’d do battle with some ancient evil and become a true hero. However, as she grew up and became busy with school, and then work, those dreams quickly became nothing more than distant memories; Childish fantasies she could laugh about with her family and friends. People didn’t ACTUALLY get Isakai’d to other worlds. Those were just stories.

At least, that’s what she told herself, right up to the eve of her twenty sixth birthday when she was accidentally pushed off an overpass, struck by a suspiciously well timed truck and then, in the most stereotypical twist possible, reincarnated in a new world.

While many people would have been thrilled to live out their childhood dreams Lana, now Serena, was not one of them. Going from a modern, tech driven lifestyle, to the daughter of a minor noble house would have been bad enough, but her new family were vassals of the Winsor Margrave family, shield of the west, first line of defense against the horrific monsters that wandered the mana wastes. She’d be risking her life everytime she took a step outside the family’s estate.

What’s worse was, reincarnation wasn’t even that rare in this world; In fact it was fairly common, with the gods each choosing a champion once a generation. While that was great, in theory, the problem was SHE wasn’t one of the chosen ones. Another soul chosen from Earth, her twin sister, Mariebelle, was; Somehow she just got brought along for the ride.

With no blessing, no special skills, and no prior martial knowledge it might have seemed like Serena was fated to die young, but thankfully her new family is anything but ordinary, and they plan to teach her how to survive this brutal new world, whether she likes it or not.

While she has a long, hard road before her at least there’s an upside. Magic doesn’t just exist here, it’s common, and the margrave has some of the strongest battlemages on the continent working for him, so as long as she survives that long finding a teacher should be fairly simple. 

What could possibly go wrong?