這兩句文法有問題嗎?

[desperado]

My professional skill is playing table-tennis ,I'm the leader of our
table-tennis school team , I win several prizes over these 3 years .

My personality is easygoing and outgoing ,so that making friends is one of my
interests, besides , meeting different kinds of people can complete my lack .

煩請解惑

thanks~~
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[Kasey Chang 小張]

Post by desperado
My professional skill is playing table-tennis

Your PROFESSIONAL skill? So you are a professional table-tennis player?
Obviously not.

And sentence should end with period, not a comma.

Post by desperado
I'm the leader of our table-tennis school team

Don't use abbreviations when you're writing something formal.

School should come first.

"I am the leader of my school's table-tennis team."

again, sentence should end with period, not comma.

Post by desperado
I win several prizes over these 3 years .

You WON several prizes, over past 3 years.

Post by desperado
My personality is easygoing and outgoing ,

YOU are easygoing and outgoing, NOT your personality.

Post by desperado
so that making friends is one of my interests,

Duplicate and redundant, and again, run-on sentence (too many commas)

Post by desperado
besides , meeting different kinds of people can complete my lack .

your lack? Your lack of what? Incomplete expression / sentence.