By the end of the application period for your semester abroad you will be contacted by the visa agency. They will inform you about the exact procedure for your visa application, and they might offer an online meeting to inform about the details and answer remaining questions.
Within the process please check thoroughly if your documents are complete and correct to ensure fast processing. Especially when you are in a hurry, this is extremely important. The visa has to be used within 90 days of the date of issuance. That means you have to enter Indonesia within 90 days after you get your visa.
As soon as you receive the study permit and the official letter of acceptance from the University (approx. 6 weeks before semester start) you can go ahead and apply for the visit visa via the appointed agent. The visit visa process takes between 1-2 weeks, depending on the chosen option at the visa agent. After the visa is issued, the agent will share the e-visa (PDF).
Please be aware that entry requirements and visa regulations are constantly changing. Inform yourself about this at the embassy responsible for your country or at the licensed visa agent.