I am against the notion that it is possible to know anything about ultimate reality. I might even go further and say the concept of “ultimate reality” is incoherent. The same can be said for the concepts of “matter” and “mind’. I am speaking in a absolute sense in making those statements. However, the concepts of “matter” and “mind” might be useful in a relative sense and a pragmatic sense.
Let me present you the Hammer Test.
Imagine you are holding a hammer in your right hand. Take some time to sense how heavy it is and how the wood handle feels in your hand. Now put your left hand on a table with palm up. Now bring your right hand with the hammer down on your left hand so the hammer strikes the palm. Try that a few times with increasing force to get the feel for it.
Now repeat the same exercise with an actual hammer. If you only do it once, that’s fine.
This one exercise may tell you everything you need to know about metaphysics. And you don’t really need to understand any special jargon.