This is an obscure pedagogical or parlor piece by Benedito Montes. It is typical of the charming, unpretentious style prevalent in early 20th-century Brazilian piano music.
Pay attention to the delicate articulation required to bring out the character of the simple melodic lines.
Comparable difficulty and character — good candidates for what to learn next.
Beijo materno is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 3.
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 Beijo materno lasts about 2 minutes.
Beijo materno 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 Believe Me, If All those Endearing Young Charms by Irish Folk Music, "s'kommt ein Vogel geflogen" by Siegfried Ochs, Albumblatt by Felix Mendelssohn — see the full similar-pieces list on this page.