Hello,

You are Most Welcome.

1) You need to create an attribute and add items to it then need to enable the option as mentioned in my previous Reply.

Then you can assign attributes to the products.

You can read the WooCommerce documentation for help:
https://woocommerce.com/document/managing-product-taxonomies/

2) We have not tested this plugin with the WoodMart theme. We cannot give a 100% guarantee of compatibility. At the same time, I have met a lot of site owners using this plugin without complaints.

If you have any questions please feel free to contact us.

Best Regards.