Looking for advice on Content type builder types

Hello I am a beginner solo dev and new to strapi. After looking over the documentation I have a question on the content type builder. Can someone please clarify when to use component, collection and single types. For example I am building my gf a blog website for fun and made the collection type for posts now I want to build an about page which just has a title, nav bar and text, maybe an image (in future) would I make the text under single type? Any help would be appreciated.