I believe that learning through experience is the best way to come to grips with
I don't know if "come to grips with" is the right phrase. Doesn't it mean something like "cope with" as if it is something very bad?
I have been trying to decode international community interrelationships since I first attended a Model United Nations (MUN) session at 14.
Prove it. Add a sentence after this claim that shows special insight you have gained into IR. What have you learned? What do you think it is that makes the UN so dysfunctional? What are some scholars writing about the UN these days? Right after making this claim that you have been learning about IR, prove it by sharing a sentence of insight.