Dumb Question

[Porsche Chick]

I have done some more careful observation and I have narrowed it down;

I start car with foot on brake.

I turn key.

Car revs to about 1200 rpm. Keeps revving, with or without my foot on the accelerator.

I reverse, back out, it dips to about 1000 rpm.

Put it in drive, it drops to 800 rpm.

Maybe this is just normal and I am being too picky? It didn't do this during the first month of ownership, though.

Is it just a PDK thing? Issue is high revs at start up.

And sadly, no PSE.