Will a donut cushion be enough to not put pressure on my butt while driving, after BBL?

Hi my BBL and fat transfer to the hips is soon and my surgeon as shown me how to sit an lay and when driving after two weeks after surgery,he said not to sit directly on the treated areas as I drive for long periods off time, he said to sit on the front on my thighs,which is not comfortable, will the donut cushion be suffice when driving not to put pressure on the treated areas ie hips and bum?Please find a picture off the donut cushion attached? Thank you!