I'll try to learn how to make a clear voice.

Question

I'll try to practice making a speech in my room.

I'll try to study hard to go abroad.

I'll try to study hard to learn in college in the USA.

I'll try to study hard to learn linguistics in an American University.

I'll try hard to be the first in score in my class.

I'll try hard to be the first in every subject at school.

I'll try hard to get 100 score in Korean (a subject).

(Would you check the expressions above and correct the errors, please?)

Answer 1

I'll try to learn how to make a clear voice. ...how to speak in a clear voice.

I'll try to practice making a speech in my room. ...giving a speech...

I'll try to study hard to go abroad.
good

I'll try to study hard to learn in college in the USA. good

I'll try to study hard to learn linguistics in an American University. good

I'll try hard to be the first in score in my class. ...to have the highest score...

I'll try hard to be the first in every subject at school. good

I'll try hard to get 100 score in Korean (a subject). ...to get a score of 100... or ... to get 100...