I think you're in the wrong sub forum here but I'm sure someone will be along shortly to confirm!
Feedback on the image:
Firstly, good start, lots to like so you aren't a million miles away.
The texture on the chairs (the wood), seems too flat and unreflective- I'm also not a fan of the tone of the wood against the dark richer tone of the tables.
Be careful with your positioning of tableware (there is a glass half in the image in line with the candle holder, I'd remove it and bring your candle holder a little closer so its centered on the table).
Background seems unfinished, really needed a beautiful back plate image of the sea to emphasise the view- black horizon makes it look forgotten.
I dont like the blurring of the image at the edges, its distracting. If you are trying to achieve depth of field then use better methods (either in the renderer itself or in post using a depth pass.
The composition and camera position is a little bland- maybe look at some professional marketing photography of similar level restaurants.
