Tips
1. Keep an eye on other pages with similar content to learn about different strategies and for inspiration.
2. Use the expertise of your students. They are creative people who typically navigate social media regularly. Let them create content for you or do an account take over for a day/week.
3. Spend time on social media if you don't already. Spending time where your students/alumni/prospective students are will help you understand how to communicate with them, where to communicate with them (what channels), etc.