How to learn Visio

This is pretty much a rhetorical question as I honestly don’t know if I would get any feedback on this.

I see all these pretty Visio diagrams on the net and I have NO idea how to create those. I have 5 years to learn how to do it in order to meet my goal of VCDX by 55. I have to be able to to not only create physical diagrams but logical diagrams for my design.

I have looked for classes on how to learn Visio but so far have not seen anything legit. if anyone has a class or a good YouTube please let me know so that I can give it a watch.