I wonder if I am reading it wrong, or if i need much more practice on this segment. It simply doesn't sound right when I play it. Can you help me expand this trill into actual notes on the sheet please?
These are how to play it and variations.
Note- the speed of the trill can be altered to suit the piece.
This documents that Mozart's trills started on the upper note, either directly or suspended. Also, the jump from G to E in Luke's answer is certainly wrong. I would suggest continuing to hold the G for one 16th, then FEF as equal 16ths.
trill is a rapid oscillation between the written note and the note above. In the Mozart case, the F is expanded into FG, or FGFG if you like.