New to the scene!

I've recently gotten some modafinil, specifically the brand Modakem or Modkem—200 mg tablets. I'm wondering what the right dosage would be for me. Should I take a whole pill, or would half be sufficient? I'm a student, and while I don't have a ton of studying to do tomorrow, I might dive into some Palworld afterward. Also, I'm curious about how modafinil interacts with pregabalin. Any insights?