I Want To Punch My Monitor So Bad

Blender is so confusing. I've only been at it for a day, but man it's been a whirlwind of emotions lol. It's very satisfying when I get it to work, but man...right now I'm trying to put a label on a bottle and I have no idea how to view what textures, shaders, and materials are attached to what objects. It's so confusing lol.

What's a good way to clean all of this up? I've got a bunch of random materials from attempts, and it's difficult to know what to delete because I can't figure out what's attached to what.

Thanks.