How to binding MVVM in C#?

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C#

MVVM

Hello.I'm trying to learn mvvm.So I did research.And I wanted to start with a simple example.But I had problems with the bind.How can I help you with this?But dont write ModelView.cs.How to bind modelview.

What I have tried:

Login.xmal

<Window x:Class="Login.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Login"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Label x:Name="lblUsername" Content="Username" HorizontalAlignment="Left" Margin="45,57,0,0" VerticalAlignment="Top"/>
        <Label x:Name="lblPassword" Content="Password" HorizontalAlignment="Left" Margin="48,104,0,0" VerticalAlignment="Top"/>
        <TextBox x:Name="txtUsername" Text="{Binding Textbox1Input, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 
             HorizontalAlignment="Left" Height="23" Margin="128,60,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
        <TextBox x:Name="txtPassword" Text="{Binding Textbox2Input, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 
             HorizontalAlignment="Left" Height="23" Margin="128,108,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
        <Button x:Name="btnSubmit" Content="Submit" HorizontalAlignment="Left" Margin="118,175,0,0" VerticalAlignment="Top" Width="75"
            Command="{Binding SubmitLoginButton}"
            />
    </Grid>
</Window>

But not LoginVM.cs not write and Model.cs is include this property
Database Name: [Person].[dbo].[PersonLogin]

Property:
[Id]
,[Username]
,[Password]