I don't remember how many hours, but quite a few. I've done three temples and most of the quests you get from townsfolk before/after the temples, minus the Gerudo region (haven't been there yet). I enjoy it a lot. I'm not a huge Nintendo person, but I quite liked BotW, and naturally TotK is a great follow-up.
Chicken Horse is awesome and very repayable with friends as you unlock more characters and places. It takes some time to unlock more stuff (kinda like Smash), but we don't find it too boring or tedious in the process.
Broadly, my thesis is in ecology of an iguana species. Nearly done, but trying not to just play games all day, heh.
I think it only feels silly because of the way we've been conditioned. You don't explicitly feel nor look "like a woman" (or however you end up identifying) so using different pronouns is simply Weird. And that's okay.
I find it helpful to "practice" in online settings and in games, as you mentioned. Any game that allows you to select your name, gender, modify your presentation, and see yourself in the 3rd person is good, like Stardew Valley. I also use SnapChat with my queer, transitioning friends. All of my friends know who I am and my pronouns, so when we have game nights (online or in person), they'll refer to me correctly.
It takes practice.