>>76406254The actual no bullshit answer is the visual novel. all ~150 hours of it
It's the best because you can go on to any other work in the series and have a sense of the world, cause it all comes from there. The only thing to avoid would be to do VN -> middle of another series, cause there's a few (prisma/illya, extra, etc.) that have their own order.
Anyone who says otherwise is either shilling their favorite as 'the only one you need to watch' (which is fair) or is trying to make it less intimidating by recommending twenty hours of anime over hundreds of reading