I've played acoustic guitar for many years, and recently began picking at the autoharp too. It's a neat machine, vastly underrated.

The "advanced" way is to hold it vertically against the chest, pressing the keys with the left fingers and picking with the right. One tries (I say "tries") to pick individual strings to play tunes... use quick changes to get all teh notes. Some tunes are of course more amenable to the 'harp than others. Also alternate tunings and chord-bar cuttings are sometimes done. I think the autoharp combined with a dulcimer is just beautiful.

There are websites -- make a quick search. They're a trip!

=-Jim=-