The song utilizes a simple three-chord progression: G, C, and D7. The transitions between the chords are relatively easy, making this song a good choice for beginners. Practice the chord shapes and transitions until they are smooth, and ensure you're comfortable moving between the chords.
The strumming pattern for "Roll In My Sweet Baby's Arms" is typically a folk or country rhythm, which is a simple down-up-down-up pattern. You can accent the down strums on beats 2 and 4 to give it a more "country" feel. This strumming pattern is consistent throughout the song.
In terms of techniques, the song allows for a lot of flexibility. You might want to use a capo to adjust the song to your vocal range. If you're a beginner, you might find it easier to play the song using open chords. However, once you're comfortable, you can experiment with barre chords for a more advanced sound.
The song is structured in a classic verse-chorus form. It starts with an intro, moves to the chorus, followed by three verses broken up by choruses, and ends with an outro. The instrumental sections follow the same chord progression as the verses and choruses.
Pay special attention to the outro, where there is a slight change in the chord progression with the addition of an F chord. Practice this section separately to ensure smooth transitions.
Remember, practice is key to mastering any song. Take it slow, ensure your chord transitions are clean, and your strumming is rhythmic.