This piece evokes an impressionistic dream-like state through its use of rolling broken-chord accompaniments. It is a classic example of Brazilian salon music meant to evoke nostalgia and quiet reflection.
Focus on balancing the flowing broken chords in the left hand so they do not overpower the main melody.
Comparable difficulty and character — good candidates for what to learn next.
Amor em sonhos is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 4.
You should be comfortable at Henle level 3 — meaning you can already play level 2–3 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 Amor em sonhos lasts about 3 minutes.
Amor em sonhos is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Berceuse by Armas Järnefelt, By Moonlight by Franz Bendel, By the Lake by Gordon Balch Nevin — see the full similar-pieces list on this page.