Backlink structure for main & product pages

Hello everyone I've got a question regarding linking structure for main & product pages.

I want to use following structure:
-main page - brand
-product page 1 - keyword X 50% + brand 50%
-product page 2 - keyword Y 50% - brand 50%

I also though about using keywords X & Y for the main page, but I'd like to avoid keyword cannibalization.

What do you think about the structure I proposed?

 

Any easily recognizable url is preferred.

 

This one seems ok. You can also add a relevant keyword to your home page.

 

Could I ask you for more details? I'm pretty fresh to SEO, and not everything is clear to me. Thanks

Thank you