Official Blizz guides (since most don't know about these):

General Discussion
1

^What I found. It’d be cool if they’d make more. But most importantly, they should make these more visible/reachable.

9 Likes
2

Bronze to masters guide in 1 thread, i love it

3

There’s also endorsed guides written by pro players that Blizz would post on their esports site. Here’s a few samples:

3 Likes
4

All these guides should be in-game, even if it just a section that opens the link in your browser

I’d love it if they had something like SC2 has as well

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5

Wish the official minimap video was mandatory viewing before you are allowed to queue for a human game.

Would be infinitely more valuable than the useless tutorial.

4 Likes