Zaak Tchek'

Hi

I'm a french student, and I'm getting start to learn python in Houdini ! I still have some questions.
First, i follow the tutorial from mixtrn to create a project manager, and i wonder if we can create a shelf tool instead of from a python panel ?
Second, I still don't really understand the way to work with Pyside2/Qt5 in Houdini to create Layout for exemple, if someone have good ressources for this it will be a pleasure

Thank's, and hope my english is understable