Beginner Gardening: Pot size for new Fiddleleaf Fig plant + other questions, 1 by GardenNovice64

GardenNovice64 wrote:
Hello,
I just today received two baby fiddleleaf fig plants. They each came in a 4" growers pot. I put both of them in this 6" pot. Is this enough room for them or should I move them to the 9" pot I originally wanted to put them in? I put them here thinking the 9" pot would be too big for them.

If moving them to the bigger pot is best, should I wait until they've settled a bit first?

Another question: They arrived with some leaves having small brown spots. Should I be concerned?

Last question: How fast do Fiddleleaf Fig's grow? I'm really looking forward to it growing into a tree.

Thanks,
Nydia