So I've never played Minecraft apart from the demo years back. Is it too late to start playing the game now or is it still relevant?

Not trolling because I want to get this game for me and my 4 year old. Also been inspired recently by some older youtube videos where they build huge structures.

What I'm worried about is that I might be too late into this and newer content, or at least what I see as newer content such as mods, can only be enjoyed of you played the game for years already.