The Letters E and F

Add 3 nodes to ellipse for an E and 2 nodes for an F.

Create new layer for letter E.

The letter E is made very similar to the B. Start with an ellipse, then move 2 nodes to the left and 2 to the right until you have a mis-shapen rounded-corner box. Select the 2 nodes on left and change node type to asymmetric. Adjust the nodes for smooth corners at top-left & bottom-left.

Add 3 nodes to the right side as shown in E image (refer back to letter B for how to add nodes). Select all 5 nodes on right side and change node type to symmetric. Drag 2 nodes (2nd node from top & 4th from top) to the left to create 'arms' for the E. Refer to image above. Rotate control arms for these 5 nodes until they all point vertical. Also shorten or lengthen control arms, as needed, for a nice chubby bubble E shape.

De-select E and hide E layer. Create new layer for F.
The letter F is made exactly like the E, with one less node. Refer to F image for placement of nodes.

I don't think it will be necessary to describe detailed steps for every single letter of the alphabet. You should be able to figure out the rest of the letters. It'll be good practice! ;-) All the remaining letters are created in the same way as A thru F. Placement of nodes and angle of control arms may be a little different for each letter, but they all start with an ellipse. The next section recaps the steps used to create each letter.