I made the same realization about my depression from handwritten journals. It started around the onset of puberty, at 13 (1998.)
Mine wasn't acting, mine was writing. I entertained stage acting for a while, but ego tripping directors beat that idea out of me.
Back in the day, there was a pack of us. Dallas Guy, RA Girl, Blue Haired Wonder, and I were the core. Others kinda drifted in and out, but the 4 of us were pretty close. Then BHW made a rash of bad decisions and fell off the face of the planet (I only recently found her on fb,) her and Dallas Guy broke up, I went off to college, and RA Girl went up north to go to college. RA Girl got very religious, I got very atheist. The group broke apart for several years. Here in the past several years we've reknit via fb. RA Girl and I are back to old friends, BHW and I are slowly getting to reknow one another and figure out what needs to stay in the past, Dallas Guy and I are still recovering from trying to date before I met Geek, RA Girl is reknitting with BHW and Dallas Guy, and Dallas Guy is recovering from dating or crushing on all 3 of us. Dallas Guy had to bow out of being my man of honor due to life getting in the way; I'm supposed to be a bridesmaid for RA Girl when the time comes; and BHW named one of her spawn after me while she was away.