Any suggestions on how I can change handedness?

When I was a child, I was forced to change from left to right handedness. I've read that according to psychology, you can never change your handedness or which brain hemisphere is dominant. And that forcing the less dominant side for most tasks will "overburden" the corpus callosum. I'm wondering if switching back to my "true" dominant hand is a worthwhile goal (my left arm is still weirdly stronger, but not as great at precision). Obviously practice is key to switching back. But I'm wondering if anyone has had this experience or any insight. Thanks.