[Grammar] in my studies/on my studies

[student_aaa]

Which sentence is grammatically correct?

This though has served as my drive to do well on my studies.
This though has served as my drive to do well in my studies.

 

[Rover_KE]

Welcome to the forum, student aaa.

In what context do you want to use this sentence?

Do you mean 'This thought'? If not, please tell us what 'this' is.