This would be 1.5KG, Chocolate Truffle cake covered with fondant , with white icing for sea effect, cookie crumps, fondant toppers and decors as per the image. On the sand side, please put a 3D girl topper (holding a beer bottle) sitting on a white chair as per the reference shared. Make items on top like beach umbrella above the chair, sunglasses, beach bag and beach towel. 

Around the cake wall, please decorate with seashells