Hello , what is the best way to learn graphic design? i need some courses for Photoshop and illustrator for creating logos and web pages design .

There's always plenty of ways to learn using the resources available to you. I believe the best way to learn is to be aggressive in taking workshops, training and online tutorials. Be patient, It takes time and practice, you'll get there someday so don't forget to have fun along the way. 

The logo could be your own imagination which will easily depict the unique features of your product without any written explanation below the logo!