Old Website gone. Is it REALLY gone? Now what? [duplicate]

Please excuse my total cluelessness. Based on what I’ve read in response to a previous question, it looks lie my lapsed domain name = All contents of my WordPress website have evaporated. Is that correct? (My site was created in 2014, and I probably let it lapse two years ago).

If I have to start from scratch, can you suggest what’s currently the best CMS for dummies? All I want is to be able to edit text, add/subtract photos and music videos, and do so without having to interact with the formatting and graphic elements. As simple as it can get. Any and all suggestions and tips are welcome. I have a MacBook, btw. Thank you!