Raff's 'Melodic Etudes' are studies focused on developing expressive playing and melodic phrasing, often with a song-like quality.
Focus on achieving a singing tone and maintaining a clear melodic line through careful pedaling and voicing.
2 Melodic Etudes (Op.130) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of 2 Melodic Etudes (Op.130) lasts about 5 minutes.
2 Melodic Etudes (Op.130) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.