This arrangement is closely based on Earl's playing from the live at Carnegie record by Flatt & Scruggs. Several of the licks capture the variations he played. Check those out after working through the main arrangement. Turn on the swing feature in the playback tab for this one, as that is how Flatt & Scruggs did it. Notice how different it sounds and feels now. Pay attention to the timing of the ornaments in the arrangements and licks. Use the focus feature to listen repeatedly before playing and during practice.
Listen to the recorded examples linked in Spotify and Apple music as well. When working on a new tune listening is just as important as physically playing and practicing. Listening repeatedly helps you memorize how a song should sound. Make a playlist so it's easy to access the tunes you're working on. You can use the Tunefox player the same way - as a resource for listening and reading just as much as for practicing.