Let us continue this discussion in chat.

Thank you so much!! :D You've answered my biggest questions. I'm gonna forth and start creating. I'll hit you up if I run into any issues.

Gotcha. So the reason the Lighting App Builder won't work is because it's intended to be used internally. Which is why the app I'm trying to build has to be done using force.com's interface right? Where I'll build objects, fields, tabs, and the community.

Thanks! I'll look into those guides. So are these guides are using salesforce's force.com platform right? Lighting App Builder is also not the right tool for the job right? It seems like that one is for sure directly tied to just CRM.

Is this using the Lightning App Builder? How do I create the object fields and tabs and then expose them to the public? Where do I create the community? Sorry, for all these questions. If you could point me to a good tutorial, that would be so so helpful. Thanks!