Op2/1 sonata
Don't try to learn this sonata. I think you should look at some more of the bagatelles, maybe the op. 49 no 1 or 2 sonata.I have had much more trouble playing op. 2 no. 1 than pieces such as Ravels Sonatine or Mendelssohns Rondo Capriccioso. I really wouldn't recommend that piece to someone grade 5.
What about Allegretto in C minor? It is AMEB grade 6 level, I played it a few years ago and really enjoyed it.The link to free sheet music is herehttps://www.sheetmusicfox.com/Beethoven/13.pdfCheers, Kylie
Andante Favori (WoO 57) - originally intended as Waldstein slow movement