Hello, My name is Gantnan Satjariyakul, Im a student is Assumption College, I’m 12 years old, I study English for 10 years.
Im come from Thailand, I enjoy study English because it going to help me in the future, I like Assumption College because the teacher is kind and good at teaching, My Personality is a kind and helpful person, My strength is a kind person, but my weakness is scared of ghost and darkness, i hope you enjoy. Thanks for reading.

Your content is good but you have wrong grammar but overall is good
your content is very good but your punctuation is wrong in some sentence but I think it good enough.
Look overall, everything is good, content and grammar. But your grammar has a little wrong.