en_tn/rut/03/03.md

uncover his feet

to remove the cloak or blanket covering his feet so that they would be exposed to the cold.

Lie down there

"lie down at his feet"

Then he will tell you what to do.

The specific custom of that time is unclear, but this is usually understood as culturally acceptable way for a woman to tell a man that she was willing to marry him. Boaz would understand the custom and accept or reject her offer.

Then he will

"When he wakes up, he will"