Looking for advice and opinions please 
I’ve got a long name that has lots of nicknames however I’ve always been known as my full name. I think I want to change to one of the nicknames but don’t know how to approach it with family and friends? I know they would all call me my new nickname but I’m worried people will think I’m silly as it’s a nickname I’ve always said I hated and never wanted to be called. For example, Rachel known as Rach, Catherine known as Kate, or Rebecca known as Becky. That type of thing. Obviously my full name will always be my full name but I’m an adult now and as much as I hated the nickname as a child, I actually like it now! I’m early 20s so I’m not sure if I’ve left it too late and it will seem weird!