First time puppy owner and going to get a Weiler Dane (Rottweiler / Great Dane cross)

I just need some advise on what to expect, what I should look into, where to find sources about the breed, how to properly socialize my dog ect. It’s really hard to find resources on this specific dog and I’ve been looking everywhere. I also have 2 children (2 and 4) and have been doing some research on how to raise them around children, but willing to hear more advice what what I should do. Thanks 🙂