Beautiful duvet cover!  You will need to use a steamer to get out the wrinkles - I used the steamer feature on my iron and “ironed” over the duvet after it was placed on the bed.  I wasn’t too concerned about having some wrinkles since this room will be getting used soon by guests and will get wrinkled anyway from use.  The quality of the duvet is what I expected for the price - is it “top line” - I wouldn’t call it that, but I do think that it will hold up fine for my use.  I do not recommend if you are putting this in a child’s room - the pom poms may not survive the wear and tear of a typical child.
I did not pre-wash this before putting on my bed. When I do, I plan on turning the duvet inside out before washing it to protect the pom poms.