Hello! I am from the USA.

[grammatically_correct]

I am from the USA. I am here brush up on my grammar skills and get a better understanding of the English language.

[Boke]

Are you also a troll?

Doesn't seem like there are many trolls on this forum so I'll guess you meant that you live in America?
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福山市　英会話

[lost_soul]

Hi, Boke
what does "troll" mean in your context ?
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Alex

How much upchuck would a woodchuck upchuck if a woodchuck could upchuck ?

(a guy from Russia)

[Boke]

a "troll" on the internet is someone who tries to make people angry on purpose by saying stupid things

Next time say "I am in/living in America"

if you say "I am from America" everyone thinks that you were born/raised there
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福山市　英会話