I apologize for my lack of knowledge but can someone please explain and maybe give screenshots of how to input Relentless Endurance into the homebrew race creator. I would greatly appreciate it, I'm so confused

The simplest way to learn is to use the Half-Orc as a template for a race just to take it apart and see how it works. You can always delete it afterwords.

I'm going to be completely honest, I appreciate your response, but what do you mean? As a free user I can't technically add things to my homebrew inventory, so I can't really pick things apart that way. But other than that I don't really know another way. I don't mean to be ignorant I am just very new to the technical side of DND

No, you cannot add public homebrews to your collection, but when you go to the homebrewer you have a choice between creating your homebrew from scratch or using a piece of official content that you have access to as a template. Use the official half-Orc race as a template (since it’s free content), and then you can see how DDB programmed its Relentless Endurance trait.

OH! Thank you so much, I understand now!!! I really appreciate your patience!!! ^w^

Happy to help. If you need more help you can always post again, or check out the Homebrew FAQ for quick answers to commonly asked questions: (https://www.dndbeyond.com/forums/dungeons-dragons-discussion/homebrew-house-rules/131411-a-homebrewers-how-to-faq). You can also ask for help there as well. Happy homebrewing!