I was looking for open source Android apps to possibly replace some of my standard apps that are filled with adware or oddly very large with too many extra permissions which makes me assume there’s something happening in the background that it shouldn’t.

F-Droid is basically the same as the Google Play store, but for free and open source apps. You can download it via their website at https://f-droid.org/en/, in fact you can use any QR code scanner to get the link, and install it using your system file viewer/manager.