I do not own goats, so I won't be much of a help but I have done lots of research as I'm considering getting NDs too.
I highly recommend reading "Storey's Guide to Raising Dairy Goats". I've learned a lot from it, and even of you decide to go with meat goats it has a lot of useful information still.
I haven't found many YouTube channels, but I do like this lady. I've found myself mostly watching the goat birth videos, since that's what I've always been most worried about. I think it helps to see what owning them is really like so you you know what to expect.