It's nice as a nickname but not as a full name. I would be embarrassed to have this name at age 25 or so. There are so many names it could be short for:
Helen,
Helene,
Helena,
Elaine,
Elena,
Lena,
Eleanor etc etc so no need to use it as a full name.
I also dislike the American pronunciation or the English pronunciation in general which makes it sound like
Laney. In
German the E sound is different kind of like LEH-nee (but the E is still long).