You’re welcome! I have read all kinds of books too on the deities I’m working with & sometimes reread them too! Morgan Daimler & Courtney Weber are good ones for the Morrigan or if Pagan Portal has anything on any of them. Stephanie Woodfield is another good one for the Morrigan too. I’m trying to remember any other books or sites I have found good information on Her for you, but my brain isn’t quite doing the recall thing just yet 
@SilverBear has a couple of meditations to meet the Morrigan:
She may have done others that I haven’t come across 
but I don’t believe so as of yet. She does have a video for Hecate I believe though:
And one for anointing oils for Hecate & the Morrigan