Hi lilly pie
I am a practising Witness and we would welcome your questions as someone that has taken the time to consider what we talk about.
Firstly let me concur that we too think "faith" comes first and produces "works" by it's existence. So it isn't faith OR works but that a person having faith inspires works in them hense why James can say.
James 2:17 (New International Version)
17 In the same way, faith by itself, if it is not accompanied by action (works), is dead.
Your next confusion is that grace has become a word which is used as a noun rather than looking at what it means so we goto meaning.
Grace = undeserved kindness.
Jesus paid the ransom price we simply couldn't as imperfect humans. So because he paid the price by his sacrifice we can gain the reward through this but this shows it is by an act of undeserved kindness/grace that we receive this reward because we couldn't pay the price ourselves. It took God's son coming to earth becoming a perfect man to save us.
You mention your dislike of us preaching to people but we take this as a serious commision from Jesus.
Mark 16:15
He said to them, "Go into all the world and preach the good news to all creation.