Beginner -- how to make a XAML User Control Bindable

I am making a simple demo to learn how to create a bindable user control.  I have created a simple class:  

class Person
    {
        public string firstName;
        public string lastName;

        public Person(string first, string last)
        {
            firstName = first;
            lastName = last;
        }
    }

I created a very simple user control:  

<UserControl x:Class="Example.ExampleHRControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <TextBlock x:Name="textFirstName"></TextBlock>
        <TextBlock x:Name="textLastName"></TextBlock>
    </Grid>
</UserControl>

What I would like to know is what do I need to do in order to be able to use the user control in context like a normal control.  I can add this to the MainWindow like normal:

<local:ExampleHRControl x:Name="Hr1"></local:ExampleHRControl>

and then I can address it through c# and add the value:

Hr1.textFirstName.Text = "John";
Hr1.textLasttName.Text = "Doe";

I would prefer to be able to create an instance of the class Person and simple bind the control on the main window to the Person class.