It also depends on where you are coming from and where you want to go. I don't think learning React is the problem, it's more about understanding the ecosystem and how all the bits go together. This is less of an issue with newer solutions, like Vue, as they become with more opinions out of the box.
Juho Vepsäläinen
SurviveJS
My friend Artem Sapegin maintains a nice list. I would look into that first. The official documentation of React is very good starting point as well.
It also depends on where you are coming from and where you want to go. I don't think learning React is the problem, it's more about understanding the ecosystem and how all the bits go together. This is less of an issue with newer solutions, like Vue, as they become with more opinions out of the box.