For a simple yet elegant French twist, do the third style in this video with these bun sticks. The video shows it with a single stick, but I suggest crossing it with a second one afterward to more comfortably distribute the weight.

I like these bun sticks, these long hair forks, and these medium hair forks.

If you're also open to plastic acetate, this is cheap on Amazon and does the job. It has a nice twist in the middle for extra hold.