I bought a black drawstring linen/cotton blend (which I prefer over just linen) on Amazon. When I want to elevate the look a bit, I just put the drawstrings inside the pants and belt it. They’re one of my favorite pants. I’ve had them for a few years and they’re under $30. I’ve bought 100% linen on there too but like I said, I prefer the blends. You don’t have to spend 3 times the price for nice quality pants.

I think that sounds like a great choice for the occasion. And you can top the trousers with most anything you enjoy wearing. A solid colored silk blouse like this one is very pretty with them too https://rstyle.me/+ZZyN6Fp-NFFzl4rb5J06zA you can tuck it in or give it a front tuck. But really any pretty blouse will look lovely against these black linen trousers.