WooCommerce Theme Help PLEASE!

The template I’ve created is here: https://www.ihearttattoostees.com/template/

I made this into a wordpress theme using a tutorial online and the blank theme files they gave… and the product page is here:
https://www.ihearttattoostees.com/shop/i-heart-tattoos/

I’m having a problem trying to organize the single product page of the Woo Commerce system. I’ve been trying for days to figure this out and just am not able to grasp it. Any information on how I would format this page. Please help! Thanks!

Also would like the SIZE drop down box to display:

[small (4 left)]
[medium (7 left)]
[large (3 left)]

THANKSSS!