“He came from a once great forgotten kingdom known as the Royal Legion and he was their most skilled and greatest knight. He saw the death of his great king and the destruction of their great kingdom, then he sought to seek revenge on the one who killed their king. But after years and years of searching he still didn’t found him.”
Like others have said, cutting down on the amount of colours would be a good idea. The scarf isn’t a bad idea, but the Stormer drone piece on the torso clashes with it. Also, the proportions are pretty funky. I recommend trying to emulate human proportions as much as you can (especially in the beginning like this).
Try doing something similar to Kopaka Master or the larger Star Wars Ultrabuilds.
There’s no surefire way. CCBS is such a flexible system that your best bet would be to play around with different bone and shell arrangements on your own. =)