This movement feels consoling and songlike, alternating a lyrical Andante with Quasi allegretto episodes where light rhythmic perturbations disturb the calm; you must cultivate an intimate cantabile while maintaining contained energy through transitions. Technically, Connaissance des formes (3.6/5) matters here: you will need to shape large phrases and manage repeats and connections so the narrative remains clear, which requires precise choices of articulation and breathing; Analyse harmonique (3.6/5) requires bringing out chord shifts and inner voices by balancing musical layers and using judicious pedaling. The piece belongs to the Romantic period and reflects Weber's move toward a more expressive piano writing, between classical inheritance and romantic freedom. I do not provide a reference interpretation here out of caution unless I can be certain of a specific, well-established recording for this sonata.