I highly recommend finding an acting school to get started and understand what it entails.
From there, start looking into auditions for student films and the like - I know it's not always fun to do work for free, but that is how a lot of actors start out. It also helps you practice auditioning, which is fundamental to acting - and fundamental to booking gigs! Nothing educates you more than actually being on set! That will also help you build your show reel and CV. You need clips of you in productions, not just acting class, to get an agent if you want to start booking commercial and theatrical work.
Having a solid work ethic is also great with building your network; a majority of my work was booked through my network after they worked with me .
Melody recommends the following next steps:
- Attend acting school if possible.
- Start auditioning!
- Jump into student films or other film projects where you can.
- Collate your work into a showreel and start looking for an agent once you've built a body of work