Switching from GoDaddy email to Microsoft

I am my company's "default" IT person and I will be leading the migration from GoDaddy to Microsoft for 16 users. I will be using Business Assist. My question is... Am I getting in over my head or should this be pretty easy? I did the migration TO GoDaddy and that wasn't earth shattering, so I figure this should be ok, but for some reason I am pretty anxious about it. any tips?