To study abroad, of course, you will need more mature preparation. A different environment and culture, high cost of living, a learning system that is not the same as in Indonesia, and various other things deserve your consideration.
Here are some things you need to prepare for studying abroad:
Explore your interests and talents to help determine the chosen study major.
Collect information on the country, university and study program that is intended. To make it easier, discussing with an experienced overseas education consultant can be one solution.
Sharpen your English language skills to be able to meet the score requirements for university admissions abroad.
Prepare academic documents (reports/diplomas and transcripts).
Prepare travel documents (passports).
Preparing for good physical and mental health to live away from family.