It's too forced
As others have said nicknames evolve naturally - my daughter has one her school friends have called her since year 1 - not one I had even thought of when I shorten her name myself - but it's perfect and suits her when she is around her friends and is connected to the sounds in her name
She would be the but of jokes if suddenly she announced at secondary school her nickname was to be LoLo
Char, Charlie, Lottie, Lotz