So uhh... does #grapheneos allow for a lot of customization out of the box like LineageOS does? like, can you change the app icons and stuff?

Also, what do a lot of the included apps look like? I cant find that many pictures of them online and I want to see them so I can determine if they look nice enough to use. 

 Like, I know what the settings app looks like because it's all in AOSP, but what about some of the ones that are not? 

 Comes fairly bare bones. The apps included are mostly simple graphic icons. Comes pre-loaded with F-Droid. Most apps can be acquired through that, Aurora Store, and Obtainium.