Привязка присоединенных свойств и моделей представлений в MVVM | WPF

Вот мое дерево проекта:

MRE_WPF
|
--ViewModels
  |
  --MainWindowButtons
    |
    --HomeButtonViewModel.cs
    --UserSettingsButtonViewModel.cs
--MainWindow.xaml
--MainWindow.xaml.cs

У меня есть три кнопки в главном окне.

<Window x:Class = "MRE_WPF.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:MRE_WPF"
        xmlns:main_window_buttons = "clr-namespace:MRE_WPF.ViewModels.MainWindowButtons"
        mc:Ignorable = "d"
        Title = "MainWindow" Height = "450" Width = "800">
    <Canvas Height = "480" Name = "MainCanvas">
        <Button x:Name = "homeButton" 
                Height = "55" 
                Width = "75" 
                Background = "#FF334166" 
                Foreground = "{x:Null}" 
                FontSize = "24" 
                BorderBrush = "{x:Null}" 
                FontFamily = "Tahoma"
                Canvas.Top = "{Binding Path=(main_window_buttons:HomeButtonViewModel.CanvasTop), Mode=TwoWay, RelativeSource = {RelativeSource Self}}"
                >
            <TextBlock Text = "Home" Foreground = "White"/>
        </Button>

        <Button x:Name = "userSetingsButton" 
                Height = "55"
                Width = "75"
                Background = "#FF334166"
                Foreground = "{x:Null}"
                FontSize = "20"
                BorderBrush = "{x:Null}"
                FontFamily = "Tahoma"
                Canvas.Top = "{Binding Path=(main_window_buttons:UserSettingsButtonViewModel.CanvasTop), Mode=TwoWay, RelativeSource = {RelativeSource Self}}"
                Canvas.Left = "{Binding Path=(main_window_buttons:UserSettingsButtonViewModel.CanvasLeft), Mode=TwoWay, RelativeSource = {RelativeSource Self}}"
                >
            <TextBlock Text = "User set" Foreground = "White"/>
        </Button>

        <Button x:Name = "changeButton" 
                Height = "55" 
                Width = "75" 
                Background = "#FF334166" 
                Foreground = "{x:Null}" 
                FontSize = "20" 
                Click = "changeButton_Click" 
                BorderBrush = "{x:Null}" 
                FontFamily = "Tahoma" 
                Canvas.Top = "100"
                Canvas.Left = "500">
            <TextBlock Text = "Change" Foreground = "White"></TextBlock>
        </Button>
    </Canvas>
</Window>

HomeButtonViewModel класс:

public class HomeButtonViewModel:INotifyPropertyChanged {
    public event PropertyChangedEventHandler? PropertyChanged;

    private double canvasTop;

    public double CanvasTop {
        get => canvasTop;
        set {
            canvasTop = value;
            OnPropertyChanged(nameof(CanvasTop));
        }
    }

    public void OnPropertyChanged([CallerMemberName] string name = "") =>
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
}

UserSettingsButtonViewModel почти то же самое:

public class UserSettingsButtonViewModel:INotifyPropertyChanged {
    public event PropertyChangedEventHandler? PropertyChanged;

    private double canvasTop = 102;
    private double canvasLeft = -1;

    public double CanvasTop {
        get => canvasTop;
        set {
            canvasTop = value;
            OnPropertyChanged(nameof(CanvasTop));
        }
    }

    public double CanvasLeft {
        get => canvasLeft;
        set {
            canvasLeft = value;
            OnPropertyChanged(nameof(canvasLeft));
        }
    }

    public void OnPropertyChanged([CallerMemberName] string name = "") =>
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
}

Я хочу изменить эти свойства при нажатии на кнопку Change:

private void changeButton_Click(object sender, RoutedEventArgs e) {
    bool mode = !(bool)Settings.Default["mode7"];
    Settings.Default["mode7"] = mode;
    Settings.Default.Save();
    var h = new HomeButtonViewModel() {
        CanvasTop = mode ? 1 : 0
    };
    var us = new UserSettingsButtonViewModel() {
        CanvasTop = mode ? 102 : double.NaN,
        CanvasLeft = mode ? -1 : double.NaN
    };
}

Но при клике ничего не происходит. Я знаю, что делаю что-то не так, но не знаю, что.

// Также я хочу использовать команду вместо Click, но давайте решим одну задачу на вопрос.