Choosing a formal or informal greeting depends on the situation.
Examples:
Hello
Good morning
Good afternoon
Good evening
Name
Ways to present your name:
"I am..."
"My name is..."
"This is..." (in formal situations)
Residence
Information about the place of origin:
"I am from..."
"I come from..."
"I was born in..."
"I currently live in..."
Position and Company
Information about work:
"I work at..."
"I am... at..."
You should mention your position and the company's name.
Qualifications
Discuss education and qualifications:
"I have a degree in..."
"I am about to graduate."
Experience
Express past experience:
"I have... years of experience in..."
"I have worked as..."
Family
Information about family:
"I come from a family of..."
Specify family members by number.
Preferences
Discuss hobbies and interests:
"I like..."
"I am a fan of..."
Age
State your age simply:
"I am... years old."
Or use phrases like "I am in my early..."
Fun Fact
Include an interesting fact about yourself:
"An unusual thing about me is..."
Examples of Introduction
"Good morning everyone. My name is Lucy, I am 24 years old. I am from Bedfordshire and work as an English teacher. I graduated in marketing and enjoy running."
Tips for Presentation
Make sure to practice your introduction.
Help each other in comments and share experiences.