Thanks to the internet, there a countless programs and videos you could watch on the craft of Acting.
I made a video offering advice for beginners as well: https://www.youtube.com/watch?v=EhTZmQZ9UCo&list=PLgEGwyVezRZffoBQrVLUqDy7DMvrsDemm
Once you see firsthand that acting is something you love doing and you really feel passionate about it, the ways in which to find acting work are plenty:
Community theater, which is non-professional but PASSIONATE people who love acting/singing and the stage.
Professional Theater, requiring you to become an Actors Equity Association Union member
Non-professional Indie film, internet content and web series- plenty of opportunities to Act. You can find jobs in Backstage.com, LA Casting/Casting Networks and Actors Access.
Voice Overs : 1. Commercials/Video Games - for Non-Union or Union look in voices.com and voices123.com 2. Audio Book Narration - acx.com
Mainstream TV/Film; A lot of non-union work out there while the rest is union, including all big budget projects.
Hope that helps!