To some extent, acting is no more than becoming the role you are playing. There are individuals that have a natural talent at this and can immerse themselves in the role with little effort. Even if you are a natural you should make it a priority to invest in your continued education. Reading, listening, studying, workshops and classes are ways you can improve your skills and become more educated in your field.
There are plenty of books available in which you can learn about the different types or methods of acting. Your local library or bookstore should have an ample amount of books to keep you busy for a while. You may not be interested in acting in a movie although having a basic understanding of the process is helpful for any actor/actress. Don't limit yourself in learning the craft. Explore the different method such as Stanislavski, Shakespearean or method acting. You may pick up a tip that can be helpful in any acting position you find yourself in.
Acting classes are often available at your local college. This is a perfect opportunity to explore the different types of classes available. Classes at a local community college should be fairly inexpensive while offering a structured learning experience. Teachers may focus on a particular method of acting and over time you can discover what method best works for you. Explore different classes by taking a voiceover class or a body movement class. These are basic classes any actor/actress can benefit from.
Take part in local workshops if they are available. This is a perfect setting to try something new and gain experience working with other actors. Workshops are usually shorter than a college class but can offer a great learning environment nonetheless. Being around others whom share a similar passion can be uplifting and provide inspiration.
At home when practicing you can stop and start over. If you're on stage in front of a live audience, starting over really isn't an option. Use the resources you have available to learn how to improvise when something doesn't go as planned. How you use your voice on a stage is different than on a film. Your movements and expressions are all aspects that you can learn about and improve upon.
The decision to enhance your skills is up to you. Make time to read or participate in a local play. Find the time to practice what you're learning. It's always easy to find a reason to not have enough time but if you're serious about pursuing an acting career you need to make the dedication to it.