It is your responsibility to find the best layout and design for developing your website. Of course, you may also want some customizations to be made for the design that you picked from the multiple numbers of designs that are available for free of cost on the internet. However, the customizations could not be done with the minimal knowledge you have. Though you have core skills in web development the lack of time would make you fail in concentrating on the website development. Hence, you should delegate the task of developing the customized website design to the web development USA team.
It is possible that your thoughts and ideas would have changed since the time you have assigned the task of developing the website to the team. Even a slight change in your requirements should be discussed immediately with the experts from web design company USA who have been working on your project. You could work with them so as to push any such enhancements in the form of the next releases so that the first version of your website is made ready for the end users to access your products and purchase them online. Only when the website is excellently designed you would impress and convince the end users to buy your products.