How can I hide the navigation bar on a product page?

I'm trying to hide my navigation bar from a specific unlinked product page on my website. I want people who click on a link on my landing page to be directed to this product page, but I don't want them to be able to click on the "shop" or "home" links on my navigation bar (on both the computer and mobile). I've scoured this forum looking for answers, but none of the codes I have found have worked (unless I'm just not doing it right, lol. I know absolutely nothing about coding). If I could keep the "about", "faqs", and "contact" links, that would be great, but if necessary I can sacrifice those. My site is: www.temple-of-love.org Let me know if you need any more information from me, and thank you in advance for all the help!

I forgot to add that I'm not sure which template I'm using. When I look in the settings it just says "custom."