self-introduction

I'm yang. (You can also say: "My name is Yang." to make it a better sentence.)

Yang is family name. (While this sentence is correct by itself, to make the above sentence and this one go along better you can say: "Yang is actually my family name." I made this correction because usually people introduce themselves using their first name. Since you used your family name, you did something different. Thus "actually" highlights that makes a better flow between the two sentences.) 

I am dental hygienist. (You can say: "I am a dental hygienist.")

 
I work medical office in company. (You can say: "I work in the medical department of a company".) 

I love everything about travel. (You can say: "I love everything that has to do with travelling.") 

Sometimes I felt that i need English in life. 

so I desperately need your help ( '-')/

(You can combine the above sentences like so to make them better: "I feel I really need to understand English so I desperately need your help.")