Houzz is for residential assignments, but apart from the curved display cases, you could either go low end and get a lot of this from IKEA and "hack" it to improve it; or hire a professional designer locally!

Hi Steven, nice! What kind of 3D rendering software are you planning to use to design it ?

Do you want to put together a design or actually set up a shop like this? Having done my fair share of waiting around while the GF looks at shoes - and more often than not having to carry her things - I have to say that this particular example needs more seats. :-)

But I would think that you would also need more mirrors, esp. small ones at the floor level, so shoppers can try on your products and see how they look without having to fight for room. There are no mirrors in the render so your customers will likely not be happy. Depending on the amount of foot traffic you expect to get, the above design might also be prone to have traffic jams around the sides and back. The aisles' width look a bit short.

Go ahead, be aware of copyright issues.

I agree with Charles. Put mirrors around the entire lower section. Make sure a wheelchair can pass between the display area and the seating. Provide some seating with a backrest.
Best wishes.