Of course you can do it. But it is good if your affiliate product is related to your site. Just go to your affiliate website and take one of the banner ads or text links and put it in your website. Hope it helps.
Obviously you can do it. Be that as it may, it is great if your offshoot item is identified with your site. Simply go to your offshoot site and take one of the flag advertisements or content connections and place it in your site. Trust it makes a difference.
I am sure your affiliate network will provide instructions on how to add the affiliate links into their website. You have to make sure that the affiliate links are added in a way that do not break their affiliate program rules. For example, you are not allowed to purchase a product via the affiliate link on your site.