In English, many adjectives and verbs are "married" to specific prepositions. You cannot change the preposition without sounding unnatural. These are called Dependent Prepositions. Don't try to translate them word-for-word from your native language; memorize them as a single chunk!
AT
Skills & Targets
Good at
Meaning: To have skill or ability in a specific subject or activity. (Never say "Good in").
អត្ថន័យ៖ ពូកែខាង...
ความหมาย: เก่งเรื่อง...
意思：擅长于...
"She is really good at playing the piano."
Terrible at
Meaning: To be very bad or lacking skill in a specific activity.
អត្ថន័យ៖ ខ្សោយខាង... / មិនពូកែសោះខាង...
Significado: Ser terrible en...
"I am absolutely terrible at math."
IN
Involvement & Interest
Interested in
Meaning: Wanting to give your attention to something and discover more about it.
អត្ថន័យ៖ ចាប់អារម្មណ៍លើ...
Signification: Être intéressé par...
Ý nghĩa: Quan tâm đến...
"Are you interested in learning how to code?"
Succeed in
Meaning: To achieve something that you have been aiming for.
អត្ថន័យ៖ ជោគជ័យក្នុងការ...
의미: ~에 성공하다
"He finally succeeded in passing his driving test."
OF
Feelings & Characteristics
Afraid of
Meaning: Feeling fear or anxiety about something.
អត្ថន័យ៖ ខ្លាច...
意味：〜を恐れて
"My little sister is afraid of spiders."
Capable of
Meaning: Having the ability, power, or qualities to be able to do something.
អត្ថន័យ៖ មានសមត្ថភាពក្នុងការ...
Значение: Способный на...
"I think she is capable of managing the entire team."