Well, let's start at the start. The first theme is a pretty (if also a bit predictable) theme with a parallel period that has a half cadence and an authentic cadence in it. That invocation of Mozart in the third phrase is exactly what it looks like.
Now if we eliminate the grace notes, the glissandi, and a few other things we'll see the outline of the theme is pretty simple.
Standard sixteen bar theme with strong cadential pivot points. But the thing about composing in general and about sonata form in particular is it's not necessarily how fancy your opening ideas are, it's where you go with them.