[Daren]

Hi Max, what fingers are you using, and which notes? A good way to practice this is placing both fingers on the notes (without pressing), so you have contact with the keys. From that place, try playing each note separately with both fingers maintaining contact with the keys. When you can do this, try playing both notes simultaneously. Listen, and see which note is playing first – when you know, you can make the finger movement of the other note faster, so they land at the same time.

Let me know how you find this!