The only thing I would add is to beware of some ukulele notation you find on the web. It's been done like guitar notation, where notes sound an octave lower than written. This means that music in the range of the ukulele appears in the stratosphere, much of it well over the treble clef. To get it to show the notes where they sound, simply lower the whole thing 1 octave (you can get some cheap, and probably even free, software to do this). Written at pitch, ukulele music sits nicely in the range of the treble clef, from middle C just below, to a few ledger lines above, depending on your instrument and the music.
I have some stuff I've downloaded which looks terrifying, with four note chords all flying way above the clef. And it's never as scary as it looks.
Good luck! And as others have said, well done.