Looking for advice on buying a thinkpad

I am not especially tech-literate and very clumsy. I want to buy a thinkpad that I can set up as a privacy machine. I mostly use my computer for web browsing and messaging and don't need something especially powerful, just something that can run bloated web pages easily and I won't have to think about again for at least half a decade.

Ideally, I want something around $300. Does anyone have recommendations for models to shop for? Anything the size of the T-Series would be adequate. I'm not a gamer or do video editing so no graphics card requirements.