I really enjoyed both of her courses and they are simple to follow and I think a great place to start for beginners.
In her Pinterest course she talks about duplicating and republishing pins, but this is the main thing that it outdated as Pinterest no longer like republished pins. It will actually just mark them as being the same pin and so it's counter productive. But just making slight changes to colours, wording, fonts or titles seems to avoid this point. I'm also practicing post the same link a week apart as apposed to just 3 days. Thankfully the Pinterest scheduler is improving.
Again her system has really helped me to get going again with Pinterest after being very sporadic on it for years.