Don’t get confused by the myriad of Diminished Chord names. You just need to know three shapes
Each of these chords shapes have different names depending on what key the music is in at the time its being used. So the C#dim chord shape above is also called Bbdim, Edim, Gdim. Don’t get hung up on this!
So when you see a Diminished chord in the music and don’t recognise the chord name, just try one of these three shapes if its doesn’t sound quite right pick another, remember there are no ukulele police in my sessions so just keep trying the 3 shapes until you pick the one that sounds right to you.