outlay of social charm/ throw somebody off the bean

[Ivo]

Would you tell me whether I am right with my interpretation of the expression in bold in the following sentence?

Even Jim blinks a little. He is making his first contact with girlish Southern vivacity and in spite of the night school course in public speaking is somewhat thrown off the beam by the unexpected outlay of social charm. (T. Williams, “The Glass Menagerie”)

throw somebody off the bean = make someone stare

outlay of social charm = an outburst of aristocratic manners

Thanks for your efforts