Need consultation with Wordpress, WooCommerce & modification of Nielsen theme

What you are asking is not really the best way to go about it. It’s impossible to learn WordPress+WooCommerce in a few hours if you are starting new.

Why not hire someone for this particular project?

This way you make sure everything turns out great and then you can watch tutorials to familiarize yourself with WordPress, WooCommerce and Visual Composer (the builder your theme uses to create layouts).

If you decide to hire a developer, I can recommend someone relliable.