You should be able to open the family from there. I haven’t done any family editing with Dynamo yet so I’m not very familiar with the process, but that might be enough to get you started.
@3Pinter
The nodes takes current families if you work inside a family… but I haven’t made nodes there can open and edit families from a project. Working inside a project would I suggest using the OOTB nodes.
If I should do something, it would be something with saving families to a folder, and then use my existing nodes. Could that be interesting? Not that I would make them now, but at some time where I have a free moment
I have now made a new node (DanEDU.File.SaveFamily) that saves the selected families as files. An example are shown below. If you want to save all families not matter what, then use the node from ReAnimation that are frozen in the example. Combine this new node with the existing once for updating your families.