So I've gotten into solo ttrpg'ing and I wholeheartedly recommend it.
My current campaing is about Tann the former front desk manager of a shitty law firm with Special Interest ln Trains who isekaied into a baby dragon who got taken in by adventure party who are "accidentally" smuggling luxury goods and getting in trouble with the guilds for not paying their taxes because they didn't know there was any law in the region, except it turns out there's a new Dark Lord making name for himself and they've set some new taxes on trade... only it turns out the party wasn't smuggling luxury goods because their luxury goods are actually fake, so what they actually are is conmen.
Anyway, Tann's goal in life is to reinvent mass transit in this new world, except because the region he is on has no iron and no wood, it's making building railways kinda impossible. So he's decided he's going to become a train when he grows up. You know, like the catbus from My Neighbour Totoro. Only bigger. And dragon based. A dragontrain if you will.
I have to assume that's how they're going to defeat the Dark Lord of trade taxes, with the power of Dragon Mass Transit. Though I don't know yet because currently half of the party is still in jail for smuggling counterfeit perfumes.
Also, and this is the important bit, because I'm using random generators for everything, the Dark Lord's name is Thok Thok.