Pink rowan

I’ve just been handed a bag of pink rowan berries. How would you go about germinating them?

Plant them as they are?
Clean seeds then plant?
Heat or no heat ?
When ?
Something I’ve not thought of?

I was going to try as they are some outside, some in tunnel, some in propagator (as it’s running & has a bit of space).

I'd do it like this........................https://treegrowing.tcv.org.uk/grow/tree-recipes/rowan