Entering Canada to Live with Husband

Hi there! My husband is Canadian, I'm American and planning on living with him in Canada. We've been together for five years, been planning my move to Canada for the past year, and got married this April. We're currently finishing up my PR application. I'm planning on going to Canada by plane in July and hopefully staying with him indefinitely. Of course, this is dependent on my PR application being completed and received within the 6 months I'm allowed to stay in Canada as a visitor with my passport. I booked a refundable round-trip ticket to show that I can travel back home if needed.

My question is, what should I say/bring to CBSA once I'm there? I'm honestly super nervous about it, even though I've been to Canada multiple times at this point. Any advice/info is appreciated!