So far these are the best methods I’ve found for cooking the following grains in the Instant pot.

Basmati Rice…
Fill the Instant Pot with water up to the 2 cup line.
Add 2 cups of Basmati rice (use the cup that came with the instant pot).
Set on manual for 6 minutes and do a 10 minute natural release.

QUinoa…
1 cup quinoa.
1 1/4 cup water.
Manual for 6 minutes with manual pressure release.

Brown rice…
So far the best I’ve come up with is equal parts brown rice and water using the Rice setting and a 10 minute release.