In some circles Calvinism unfortunately has a reputation for being sinfully contentious, especially when self-labeled Calvinists are arrogant and when non-Calvinists misunderstand what Calvinism really is.
This 94-page book should help:
John Piper. Five Points: Towards a Deeper Experience of God’s Grace. Fearn, Scotland: Christian Focus, 2013.
It’s available as a free PDF.