I don’t recommend it. I have a very common first name, but due to its length + my maiden name + just preference, I have been known by my nickname since I was a toddler. My nickname isn’t truly a derivative of my legal first name, and while it’s a common girls’ name NOW it was very unusual for a couple of decades. Few people even knew what my legal name was.
The issue arose when I became a full-fledged married adult. Suddenly I was in the hospital, seeing the doctor, filing paperwork, going to appointments, and meeting all sorts of new people. Nearly every single one of those scenarios used my LEGAL name; the issue was that you could call me by my legal name and it wouldn’t occur to me to look up. You’d call out my name in a waiting room and anyone else with my very common legal name might look up, but I wouldn’t! Changing my address involved complications as well, as I had to file and specify as if I was two people. And eventually receiving checks became a pain - once the bank I’d used from childhood experienced enough staff turnover AND I moved across the county, I no longer was allowed to use my nickname and thus when anyone wrote a check to my nickname I’d need to endorse it as if a third party was signing it, and everything was delayed.
Today I use a nickname that encompasses both my legal name and my lifelong nickname. I don’t even like the name, but it’s got enough of BOTH in it that it catches my attention AND people connect it with me either way, whether they have always known me by my nickname or only known me by me legal nickname. My husband still uses my original nickname as well as my own family, and those who have known me my whole life… but I don’t frankly feel like her anymore. She had a lovely childhood nickname but constantly spelling and explaining ruined her name except for nostalgia. And yet I’m not brave enough to ask those I’m closest to to just use my new nickname.
Banking and moving and taxes and doctors and new friends and in-laws (I couldn’t do a “formal” style wedding invite with my middle name and all because nobody would’ve known WHO that legal person was!) and such might seem far away when you’re naming a child, and might be okay into the teen years, but the disconnect became extremely annoying in my adulthood!