Custom woocommerce admin

Hi,

I’m trying to remove and edit some products fields from woocommerce admin.
– I would like to hide the “description” field. My theme use the “short description”. I can hide the short description in admin but not the description.
– I need to make some field mandatory to save the product (title, short description, pictures and price)
– And for the prices I would like to edit this field to be a dropdown list instead of a text field.

Is there any way I could edit those field without touching woocommerce code and lose everything after an update ?

Best regards