1. One person cannot form HUF, it can only be formed by a family. HUF consists of a common ancestor and all of his lineal descendants, including their wives and daughters. HUF usually has assets which come as a gift, a will, or ancestral property, or property acquired from the sale of joint family property or property contributed to the common pool by members of HUF. Once a HUF is formed it must be formally registered in its name. A HUF should have a legal deed.
2. The self acquired property left behind by the father upon his death shall devolve equally among his legal heirs who shall be successors to succeed to the estates of the deceased, this is called as intestate succession.
This will not come under joint family property or HUF property.
3. The minor's share in the ancestral property cannot be sold by anyone including the guardian of the minor child without court's permission.
They may have to file a petition before court seeking permission to sell the share of minor child show causing the interest and welfare of the minor child by selling the share of minor child.
The court may grant permission if convinced about the reason put forth in the petition seeking such permission.