Even in the 'thin' theater scene, you are going to have to audition and try out just like everyone else. Do this before you start traveling, spending money, etc. You might want to also consider singing and dancing classes. They are likely to be cheaper and local. Even if you don't want to do musical comedy, it helps to have a diversified portfolio in this as in any other profession. Furthermore, singing helps you with the ability to project your voice, and dancing and choreography help with how you move on a stage or even in fight scenes.
You're older but it's not impossible. I have a friend from High School who started acting at about age 40. She will often have a line or a nonspeaking role in a commercial, or be a part of the mix in a party or restaurant scene or the like. But manage your own expectations. With no experience or training, and a late start to boot, you're probably not going to be doing Strindberg right out of the gate.
Best of luck to you.