Alas, this is a surprisingly hard question to answer, at least for FPGA design.
Here are a few sites that helped me learn:
* https://www.nandland.com/verilog/tutorials/index.html
* https://1bitsquared.com/pages/chat (Discord)
And a few interesting blogs:
* https://blackmesalabs.wordpress.com/
* https://tomverbeure.github.io
* http://labs.domipheus.com/blog/
None of the introductory FPGA books have impressed me, so I don’t have any recommendations there. Maybe some other HN readers will have some suggestions?