The only other site I use for Android community is:
Android Forum for Mobile Phones, Tablets, Watches & Android App Development - XDA Forums
If you want to access the forum from the home page then you press the 'forum' button. If you want to make Android phones behave the way you want then it's where the expertise is. This site has changed beyond all recognition over the last couple of years.
For all other Unix/Linux O/S's, unix.com is the place to be.