This can be said for any camera someone is new to. Obviously it will take time to get used to it the workflow of it and I will test on still-life first. Afterwards, the only way to practice portraits is to actually put a patient person in front of it. I'm sure I'll figure it out. Apparently the Speed Graphics are the only one ready to work with the Aero Ektar 178mm so I'll stick with those for convenience!
YouTube has taught me more than any book and much faster too. You are free to read books but let's not pretend like YouTube is inferior. Many of the best videos I've watched are just readings of the information from books, with a visual tutorial attached. Win/win in my eyes. In reality, if we don't act this like it's a military procedure, all I really need is some videos on YouTube (which ive already found) that show me how the system works, the camera's manual, and some practice. I've done this with the RZ67 and it can't be that much harder to operate a bigger box. You twist the knobs to set the tensions, you pop in the film holder and remove the dark slide, you spin the knobs to adjust the bellows/focus, you fire away. On the Speed Graphic anyway, which is what I'm interested in. A few books is a good idea, just don't have the patience for it right now.
Let's relax guys, photography can be fun if we let it.