Tunefox
The Clever Way to Learn & Practice Bluegrass Music
This one is a bit tougher than the basic melody. Here you will "play the syllables". Use the tempo slider and pay attention to the suggested fingerings for the fret and pick hand. If you have trouble still at slow speeds use the difficulty slider. Learning a measure at a time is also a good form of practice. Use the focus feature to listen to and practice each measure repeatedly.
Check out the licks to explore interesting variations and see some options for alternate fingerings