As a writer, I went for second person because it’s more popular. And when something is popular, there’s probably a good reason why.
You can always stray from the pack and choose to do first person if that’s something you feel works better with your game. There’s some great first person IFs that I didn’t even really realize were first person like Barbarian: Defiled Hearts.
You can also write a short draft in both first person and second person to see which one works better.
That’s just some of my thoughts, hope your writing goes well, xoxo!