C++ is the same as a language, but you should definitely check out the C++ tutorials in UE4 to understand how it’s used in the engine itself, once you got the basics of C++ down.
I’m not entirely sure how up to date this series is anymore, but it was a great place to start from a while back: https://.youtube.com/playlist?list=PLZlv_N0_O1gb5xvsc7VM7pfoRAKLuIcFi
You can always download an older version of the engine if it’s not possible to follow with newer versions, but it should be mostly the same.