Everything is on intention. This can be used for evocation.
I rarely invoke.
You can offer cypress leafs. Beer and bread is the standard offerings for the Egyptians. Or you can offer just water. What we take for granted isn’t really so in their eyes.
He’s been very protective and caring, doesn’t talk as much but when he does he speaks to the point.
The only thing I’d advice you is to be respectful, as with all Gods and entities.