Audio not working
Make sure your right click on the speaker icon to make sure the right output is selected as well as going to preferences and making sure bluetooth is set in there as well should be some volume controls. As far as the audio skipping if there is no lag in the playing I would probably try another cable myself to see if it resolves the issue. Also if your bluetooth speaker has an aux jack on it I would suggest trying it that way as well. Let us know how you make out.
Make sure your right click on the speaker icon to make sure the right output is selected as well as going to preferences and making sure bluetooth is set in there as well should be some volume controls. As far as the audio skipping if there is no lag in the playing I would probably try another cable myself to see if it resolves the issue. Also if your bluetooth speaker has an aux jack on it I would suggest trying it that way as well. Let us know how you make out.