Ok so the featured image will appear when you click on Blog before the text. If you add mages within this text box - they will appear where you add them but you can get some odd results so better to stick them at the start or end.
Now for a table:
| This is a table | So what if I write something here |
| I got this new row by tabbing | And what if I make the sentence really really long and do I get any control over that? |
| You do get an option to add a column before or after | Actually it looks ok |