OK so far? Now let's start adding some text to your table.
Step 3
First we'll insert the header. In the first section you have already added the code:
<td style="border: 1px solid #000000; background-color: #ffffff; width: 560px; vertical-align: middle: text-align: center; line-height: 0px;" colspan="4"></td>
Now copy and paste the following code between the "4"></td> tags:
<span style="font-family: arial; color: #000000; font-size: 12pt; text-transform: capitalize;"><strong>your heading goes here</strong></span>
Using the attribute text-transform: capitalize; will make each word start with a capital letter and save having to use the shift key to capitalize each word. You can also use the attribute text-transform: uppercase; if you want all capital letters.
Preview and you should see this:
Happy so far? Save as draft and on to step four, inserting the sub heads.
Tables baffle a lot of people - I've seen a lot of questions here about them - and without a plugin, going into HTML for some people can be very daunting.You've clearly explained tables in a very easy way to understand.
If I could add one thing, where you have "width: 123px;" - that can be changed to a percentage - so your table becomes a little bit responsive. eg. "width: 40%;" - then the table will adapt as much as possible to the size of screen it's being viewed on.
All the best, Mark