Inserting & Querying MongoDB data with Go

package main

import (
	"fmt"
	"log"

	"gopkg.in/mgo.v2"
	"gopkg.in/mgo.v2/bson"
)

type Customer struct {
	Id              bson.ObjectId `bson:"_id,omitempty"`
	id              int           `bson:"id,"`
	firstName       string        `bson:"firstName"`
	surname         string        `bson:"surname"`
	gender          string        `bson:"gender"`
	address1        string        `bson:"address1"`
	address2        string        `bson:"address2"`
	city            string        `bson:"city"`
	state_region    string        `bson:"state_region"`
	county_province string        `bson:"county_province"`
	postalCode      string        `bson:"postalCode"`
	country         string        `bson:"country"`
	acct_bal        float64       `bson:"acct_bal"`
	status          string        `bson:"status"`
}

func main() {
	uri := "localhost:27017"

	// connect to mongodb
	session, err := mgo.Dial(uri)
	if err != nil {
		log.Fatal("Couldn't connect to db.", err)

	}
	defer session.Close()

	// collection
	c := session.DB("mydb").C("customers")

	// query one
	result := Customer{}
	err = c.Find(bson.M{"status": "B"}).One(&result)
	if err != nil {
		log.Fatal("Couldn't find him.", err)

	}
	fmt.Println("One Result: ", result)
}

So that's the code,
If I run the MongoShell I get the correct results ::

{
"_id" : ObjectId("528cb19def5c88795f00000a"),
"id" : "00000011",
"firstName" : "Gerardo",
"surname" : "Guilfoos",
"gender" : "M",
"address1" : "854 Cheerful Breeze Way",
"address2" : "",
"city" : "Tavaux",
"state_region" : "Franche-Comté",
"county_province" : "Jura",
"postalCode" : "39501 CEDEX",
"country" : "FR",
"acct_balance" : 172.87,
"status" : "B"

}

But the Go file when run gives me this::

One Result:  {ObjectIdHex("528cb19def5c88795f00000a") 0           0 }

I'm following along a course from Udemy and they provide the data structures. Unfortunately for me, the examples they provide are all in PHP so I kind of have to figure out a way to convert all of the code to Go which has been weird.

Also on a second note::
How does one insert a data that matches that struct into a mongoDB collection?
I tried this but it has been a failure.

err = c.Insert(&Customer{"id": 1, "firstName": "Joe", "surname": "Hat", "gender": "M", "address1": "46 Pine Road", "address2": "Apartment 1613", "city": "Scarborough", "state_region": "G.T.A", "county_provine": "Ontario", "postalCode": "M1L 1N1", "country": "Canada", "acct_bal": 8.90, "status": "AAA",})

Export the field names.

type Customer struct {
	Id              bson.ObjectId `bson:"_id,omitempty"`
	ID              int           `bson:"id"`
	FirstName       string        `bson:"firstName"`
	Surname         string        `bson:"surname"`
	Gender          string        `bson:"gender"`
	Address1        string        `bson:"address1"`
	Address2        string        `bson:"address2"`
	City            string        `bson:"city"`
	State_region    string        `bson:"state_region"`
	County_province string        `bson:"county_province"`
	PostalCode      string        `bson:"postalCode"`
	Country         string        `bson:"country"`
	Acct_bal        float64       `bson:"acct_bal"`
	Status          string        `bson:"status"`
}

The BSON encoder serializes exported fields only. Other serializers such as encoding/json and encoding/gob also work with exported fields only.