Distinguishing the differences between the initial sounds of "G" and "C" are difficult. @_@
‹g› is more fricative-like as in these words:
- Arabic غريب
- Spanish amigo
There are more examples on Wikipedia’s page (https://en.m.wikipedia.org/wiki/Voiced_velar_fricative) but some are suspect (like Turkish ğ which is an approximant or silent usually).