6/8 is the compound time signature everyone meets eventually — fiddle tunes, banjo, bluegrass, Irish folk, jazz waltzes. There are six eighth notes per bar, but they group in 2s, so the pulse you actually feel is 2, not 6. Counting "one-and-a, two-and-a" gets you there.
This page is set to 90 BPM, 6/8, traditional drum. The drum mode gives you a clear accent on the downbeat of each group: BUM-bum-bum · BUM-bum-bum. That rhythmic lilt is the entire feel of a jig — once it is in your body, the tune basically plays itself.
Open the app and tap your foot through six notes (BUM-bum-bum · BUM-bum-bum) for a while before you ever pick up the instrument. Your brain will fight this for the first two weeks — it keeps wanting to count to four. That is normal. Stay with it; the compound meter sinks in around week three.
The app pre-sets to 90 BPM, 6/8, traditional mode. To adjust, use the controls inside the app after it loads.