It is perfectly ok to start with C++14, in fact probably preferable to starting with anything before C++11. The idioms changed a lot in C++11. I think changes since then have been minor and incremental by comparison.
When C++11 came out, there was an immediate feeling that the language had received a major overhaul and the best ways to do most things had completely changed. Everything from before that was legacy code, though a lot of it was around. I expect it is still mostly like that.
Or do you mean about Rust? Yes that is new. I still don’t understand the attraction of Rust over Ada that well.
No, I mean in 2014 the advice was not to start with the latest. Every source I found on the topic recommended getting familiar with 8 and then increment my way up to 14.