Tables may seem complicated at first but there are really easy, first start with this;
to add a row type <tr>
then to add a column type<td>
type your text next then end the column</td>
and either start a new column or end the row</tr>
To do this;
Row span
text
text
text
type<td rowspan=3>rember to change the number acorrding to how many rows it spans
To do this;
Col Span
text
text
type<td colspan=2>rember to change the number acorrding to how many cols it spans