When you use more than one platform, it's difficult to get good results. This is the common mistake that many users make and as a result, they end up believing that personal branding is not rewarding or a useful process.
As a beginner, focus your efforts on platforms such as Facebook, Instagram, Twitter, YouTube, and LinkedIn where your target audience is mostly present. Post only on those platforms which are performing well for your personal brand. Once your personal brand grows on these platforms, you can begin focusing on other social media platforms as well.