Product page > previous/next product

Its possible to add features to a page using hooks:
https://docs.woothemes.com/wc-apidocs/hook-docs.html

In this case you would use:

add_action('woocommerce_before_single_product', 'show_arrows');
function show_arrows() {
  // php code to show arrows and html

Its unlikely that someone would provide the code through a forum answer. Time and system access are necessary. So you will need php skills or a developer to help: https://jobs.wordpress.net/

The Virtue Premium theme does come with this feature. For this theme the arrows will navigate between products in the same category. There may be other themes with the feature as well.

Indeed, it is too complicated for my skills ??
Thank for your advice, Lorro