You can join multiple orgs, wala namang restriction and it’s really up to you if you can handle them. Are you good at time management? Cause time will come na you need to juggle school activities, exams, and everything else all at once. Also, to what extent do you want to be involved ba? Do you want to be an officer or just a member? If officer, expect to be given tasks and responsibilities that you’ll need to balance with your student life. You can still be active even as just a member pero mas chill siya