A colleague recently pointed out that Vue Mastery were having a free weekend so I signed up and ran through a few of their courses as a refresher. I found the Vue documentation kind of difficult to get through when I first started picking it up as some of the concepts are very new. The Vue Mastery courses are clear, concise, come with examples and solutions. They also make really good visual examples of how the code interacts with each other, which is really useful for things like the reactivity of Vue.
I've subscribed to check it out in more detail over the next few months but can already highly recommend it. Their Intro to Vue.js is free, so that would be well worth a couple of hours if you just want to try it out.