I found Vocaloid like the week before Kiyoteru, Miki & Yuki were revealed, so I think I had just turned 9, And I discovered UTAU sometime during mid 2010 so I was 10 at the time.
I remember trying to install UTAU on my dad's computer, and he thought it was a virus of some kind, so instead he downloaded some old karaoke program from 2004 for me to use instead lol. I think I ended up installing it anyways and hiding the UTAU folder somewhere in his harddrive because I was a little demon and wanted to use the program soooo bad.
For some reason, I thought that the only sample you needed to record was "Do Re Mi Fa So La Ti Do" (all stringed together), and UTAU would generate a voicebank off of that. Needless to say, I was disappointed when my voicebank with 1 sample (saved as an aud. file bc I was using audacity ofc) couldn't sing along to Paramour...