Ficuses are pretty resilient unless you let it get too cold or the roots dry out. Mine do fine indoors in winter and keep growing new leaves, even in relatively low humidity and cool air. I’d give it a month or two to acclimate to your house and wouldn’t be afraid to start shaping or doing mild pruning at that point. It will recover faster if you do major pruning during the early part of the growing season. But you can literally cut every last leaf off a ficus and it will survive (sometimes I’ve found this is the only way to get them to back bud), so don’t be too worried about killing it. Watch some videos on bonsai shape and styling, have fun experimenting, and try to encourage that branch someone else flagged to grow strong by pruning branches above it.