Thank you so much Jeff for the reply.
I have done the first step of selection with marquee tool, but could not understand the gradient one. I will be obliged if you can please clarify it step by step as explained previously:
“Make a new layer, select the gradient tool from white to transparent, and make a light gradient from about 10 pixels above the letters to around 5 pixels after the end of the selection”.
As I do not even know how to make white to transparent gradient and how to apply it.
And thanks for not feeling me like dummy but to be honest I am really dummy in photoshop. Regards.