My end goal is I want to learn to create a script that can handle an escrow like service, where 2 parties can agree or disagree that the agreement is to satisfaction and if there is a disagreement then a third party can step in and mediate.
Not wanting to dull your thirst for knowledge... but isn't that sort of escrow scenario already handled by a simple 2-of-3 multisig wallet setup?

I believe so, but I have bigger plans once I figure out some of the basics.