A typical Tin Pan Alley style piano arrangement of a popular early 20th-century song. It features a straightforward melodic structure with a rhythmic, danceable accompaniment.
Achieving the correct rhythmic swing in the accompaniment is essential for this style.
Comparable difficulty and character — good candidates for what to learn next.
'Cause I'm in Love is rated Henle level 3 of 9 — late beginner repertoire, roughly ABRSM grades 4–5. In the RCM system it corresponds to about level 5.
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 'Cause I'm in Love lasts about 3 minutes.
'Cause I'm in Love 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 'Tain't No Sin by Walter Donaldson, 'Tain't No Sin (To Dance Around in Your Bones) by Walter Donaldson, Beija-flor, IEN 4 by Ernesto Nazareth — see the full similar-pieces list on this page.