If you have other phone, (I.E. android), same steps applies in installation: If only applies to your phone, my apologies.
7.) P.S. Number 6 step, You will see the Home/Collections/Communities/Notifications icons at the bottom. Click on communities and or Hit Home button and type on search bar-example: is Brains and Beauty. Click on Join, or Ask to Join, whatever that applies. (Some communities you see are just examples, so find/search something that you're interested at).
You're good to go. Enjoy Googling-plus! :-) ;-) (Yes, my friend is nowadays on Google plus, too; and is now satisfied . LOL)