Greetings!
I strongly believe this is a fairly quick mission, I will have it done in 2-3 days according to my understanding of your request.
I will need more specific details on your needs, for example:
1) Desired position for your Pickup button.
2) You want ANY (unauthorized) visitor to be able to enter a review? If so, you'd probably want it to be sent for your approval, perhaps to your backend endpoint? or maybe for now you want to let any one review. It's all ok, obviously.
I wish you review my request and I'll be more than happy to be of service.
Thanks, Boris.