I don't know if I should make this as Create your own adventures or as a Quest thing. But then thing is I don't have much world building for it either ways.
additional classes or additional NPCs?
not very practical for adventurer
should be slim, fit and healthy
A lot of people would say that there's no need for more quests, or quests at all to start.
But that aside, questing does involve writing and you seem to be ESL. Not to say that we don't have ESL QMs, or that English native QMs are even particularly good at writing on average, but it's going to be difficult on your players to understand your writing and difficult on you to communicate them.
As well, I don't think a quest is what you're looking to do. You created... some kind of D20esque character sheets and the whole logistics and mechanical part of questing tends not to run at all with systems that involve a lot of dice rolls. I assume you want to use what you've got here, you won't be able to.
But yeah quests are pretty lame.