Learning Linux without switching over my pc?

Sorry if this is a super noob question beforehand.

I’m interested in learning Linux. I want to learn how to actually build it up. Been a windows guy my whole life and always had the whole os given. I want to really learn the ins and outs of Linux. That said, I’m not exactly ready to buy a new computer to do so or switch all my existing data over to do so.

Is there a way that I would be able to start working on a Linux os without needing to do any of that, and also, which distribution would you suggest to get started with?

Thanks for any help!