This course is a great introduce to go language, it contains great marerials and practice exercises.
Thanks to author Romanov Vasily for this course.
https://www.coursera.org/learn/golang-webservices-1
https://www.coursera.org/learn/golang-webservices-2
I studied this course for free (without purchase), so I wasn't be able to test my homeworks at the coursera server.
I tested it local only. It means that my homeworks probably may be incorrect or contain errors.