Did you turn on an in-game quest guide option? You can also try this official guide: https://docs.google.com/document/d/1E_uaxy9o-6ufuhWMBpQUTAzqKXx5f8t-tiAz7U3FI4w/...
By the way, it's pinned here above the downloads. I did this quest myself but I forgot the details, sorry.