Yes, of course. Just to be clear, I totally understand what you're doing and why! I think your ideas are all good and I can see why they're in there. It's just the fine tuning of how to implement them that could be improved for future builds.
Like James having a lighthearted meal with friends while introducing them to human food. Good idea, but would pizza really be the thing he'd choose as a somewhat professional martial artist? Or perhaps he could only give them pizza while clearly stating that he's not eating any because of his strict diet or something (or did he already do something like that? I can't remember).
Same for using the upcoming duel as a method to introduce more backstory and lore while also building up tension. Good idea, but why a sword fight instead of boxing or wrestling? Both kinds of duels would make sense in this setting but the second one gives James more of a realistic chance.
Having a premonition to introduce the villain and add some mystery is also a good idea. But you should think about how this affects the characters at that moment.
I'm sure you get the point by now. Your ideas are good, but you could think a bit more about how exactly to implement them the best. Again, no need to change things you've already sunk tons of effort into! (aside from the small/easy issues, maybe). I'm not saying that you have to do this and that to make it better or anything like that. My advice would just be to explore the options you have for implementing each idea and then choose the one that fits best with the characters and setting.
Oh, and don't overwork yourself. We all understand the struggle of balancing school/work with hobbies. There's no need to rush or stress yourself out.