Within web design, as you all know, there are two parts: the design of the code that makes the web work and the graphic web design (The design of the interface).
Well this is a fantastic work for graphic designers, since it is not necessary to know how to program the code of the web, you just have to form a team with a good computer scientist who will take care of that part and agree between the two how your web will be and how it will work (or the one that a client has commissioned ) and work side by side so that the code and interface match perfectly.
Here I leave you 25 graphic designs for web interfaces designed with photoshop from which you can to inspire to start working on your projects.
Also, you can download them en PSD format, to open them and investigate how they have been designed.
Source | 25 web interfaces made with Photoshop