If you can go to places online then it is connected.
The ones without locks are the ones you can use, unless you get passwords for the others.

Could you tap on the unlocked ones - it might tell you if you are connected or it will ask/say connect to?

If you open the chrome browser I think it should look just like on your computer.. open chrome and type something in to see if goes there or brings up anything..

And the video I saw on you tube showed an icon for settings, that might be the place to explore.