Voice overs are needed for many different projects including radio ads, television commercials, YouTube videos, audiobooks etc. As a complete beginner you can start offering amateur gigs on websites like Fiverr.com to get some experience and feedback from potential clients. If you are worried about spending money on a home recording studio, you can see if you get any interest from clients with the set up you currently have before investing any money into new equipment. You can then go to websites like Voicebunny.com or Voice123.com to set up a professional profile and get higher paying jobs.