place th currency switcher in nav bar

Hello
You can do it by shortcode: https://currency-switcher.com/documentation/#!/section_3

<?php echo do_shortcode(‘[woocs]’); ?>

I am new to wordpress, may i know where should i copy and paste the shortcode?
I want to add it in the top bar.

Thanks

I think in header.php
You can ask somebody for it here: https://www.fiverr.com/search/gigs?utf8=%E2%9C%93&search_in=category&source=guest-hp&locale=en&query=css&category=10&sub_category=140&page=1&layout=auto – css works for 5$