In the 7th chapter of the Book of Amos, he is defending his prophesying to Amaziah, who told him to stop. He says (paraphrasing) "I'm not a prophet! I was just minding my own business, tending my sheep and figs, when God told me to prophesy to Israel."
Isn't that just the way God works?
There you are, minding your own business, tending to your sheep and figs, and all of a sudden God yells down from Heaven: PLOT TWIST!
And your whole life changes forever.
It isn't always a welcome change. People don't always celebrate our new position (see Amos 7:13) but God knows what He is doing. If He says do it, be like Nike and just do it.
God will help you through the rough spots. He has promised.