Sometimes help is just encouragement or acknowledgment, but sometimes it might need to be transportation or procurement or something physical.
photo by Megan Valnes (of Holly Dodd)
Do It.
If you're going to unschool, do it now and do it well.
Part of doing it "well" is moving into it deliberately and with clarity, and going gradually, but by "gradually" I don't mean over five or ten years. Childhood lives in weeks, days and hours, not in months, years and decades.