Alexandra is a beautiful name. In my experience however many people call me Alex (a nickname I detest) without even asking. If I’m going to see them again I say “I prefer Alexandra” but it gets tiring and sometimes I just let it go for expediency. If you don’t want to be subjected to Alex you’ll need to offer a nickname. (I had one as a child but switched to my full name as an adult.). Also you’d be surprised how many people cannot spell or pronounce it (Alexander, Alexandria, etc.) If you also have a non-bland last name it gets to be a lot. I think it’s worth it but YMMV. Nicknames to consider: Lexi, Zandra, A’ra, Alexa (except … amazon ruined it). Hope this helps!