Volume trigger on the Touch Bar

Hi guys,
I'm pretty new to the Touch Bar section of BTT and want to have a volume slider in the Touch Bar to easily change the volume. I already created a group of two gestures, one for volume up and one for down. But the issue is, I put the app switcher behind the volume slider, and whenever I slide in the switcher, it also changes the Volume.
And have the two gestures have to be in a group?
Is it possible to give the volume slider a frame or something like that, so it just reacts in this area?
Ps. Does someone know a good video tutorial to learn more about the possibilities of the Touch Bar?