Some tips with Go and Gogland

Hi all. I'm very new with Go and Gogland. I have a project

1. I choose "Run kind" as Package - to run not only main file but a project. Why it cannot find main package??
2. How to import util.myprinter package to main.go to use it??

Please, help me

First, the general structure of your Go workspace seems to be wrong. You need to make it look more like this:

D:
|-- go_projects
|    |-- bin
|    |-- pkg
|    |-- src 
|    |    |-- FirstSteps
|    |    |    |-- main.go
|    |    |    +-- util
|    |    |         +-- myprinter.go
|    |    |-- SecondProject
|    |    |-- ThirdProject
...

Second your import statement seems to be empty, I have no idea how GoLand works but if you want to use whatever is in your myprinter.go file, you will need to import the util package, assuming that the myprinter.go file declares its package as util at the top.

// FirstSteps/main.go
package main

import (
    "FirstSteps/util"
)

func main() {
    util.MyPrinterFunc()
}

And of course to be able to use anything from util there first must be something...

// FirstSteps/util/myprinter.go
package util

func MyPrinterFunc() {
    // do stuff...
}

Edit: I'm sorry, I didn't actually answer your question initially. You're getting the error Cannot find package 'main' because of the wrong workspace setup I already mentioned. The Package path tells GoLand where the package you want to run is relative to the $GOPATH/src directory. So after you've setup your wrokspace correctly, you should set the Package path to FirstSteps since that package's absolute path will be $GOPATH/src/FirstSteps. If, later, you want to run the util package you would specify Package path as FirstSteps/util for GoLand to be able to find it.