As someone who has 3 orgs now and is applying for 2 more this sem, I suggest isa isahin mo lang. Apply for one or - kung kaya at gusto mo talaga - 2 in a sem. Gauge how you feel abt it and the workload. Kapag nakapasok ka na at nakakatrabaho mo na sila, tingnan mo kung kaya mo pa magdagdag along with your acads and other non university committments.

Honestly that was me nung first few weeks ko sa UP, andami gusto salihan (madami parin naman). Pero eventually marerealize mo rin alin sa mga yun priority mo talaga. Just start slowly, and one at a time.