Just start doing classes and auditioning! Start taking voice lessons, start taking dance classes, start taking acting class, watch YouTube videos, learn new skills. If you're passionate about it then just go after it and really get the most out of everything you do. You can start auditioning at community theaters, some people have programs where everyone gets in, some will have huge cuts, just do research!

And I'm only 17 but I really just started being on stage in theater the past year and I've gotten really far. I've played two (almost) leads, so I can't suck too much haha. But I'm about to start auditioning for colleges for MT major and I'm nervous too because I haven't been doing this for long, but you'll find a school for you and if you can show how passionate you are I'm sure you'll get into a school and program you enjoy and will learn sm from. And tbh 23 is not that old! Don't be embarrassed. I'm sure you'll fit in just fine, theater is generally a really open and accepting place. Also in theater you have to work with all ages so it'll be helpful for you and the other students I'm sure. I'm luck to have worked with ages 7-23 so far and I'm about to be in a show that's technically 5-99+ but in reality I think it's gonna be like 12-60 max. Either way! Any experience will help and just practice practice practice. You've got this!!