Here are the steps to edit the glyph for character A in your new "My Handwriting" font:
1. Double-click on the cell labeled "A" in the Glyph Overview window to open the Glyph Edit window.
2. Choose Contour from the Insert menu. Use left mouse clicks to add points on the contour and right mouse clicks to add points off the contour to create curves.
3. Create two contours to represent the letter A, making sure the contours that need filling are clockwise.
4. Press Apply or click the first point to finish the contour.
5. Repeat steps 2-4 to create the second contour.
6. Use the Select tool to check