Free Wills / Trusts Legal Advice

I would Request for a Will format where in, post my death, I would like to all my assets / properties would be transferred to my wife for her lifetime and then to our children who are currently minors. However in the case both me and my wife die before my children become Majors, then I would like to have an Executioner clause envoked, preferably 2 Executioners who will handle all my assets amicably till my children attain majority.I don’t have lot of assets but I’m concerned to take care of my children if anything happens to both of us because we had late children

My grandfathers whole property registered in my dad’s name but he is simply selling that property for other expenses like drinking and wasting it on other sake…. Without taking any permission of mine (Manav) he is selling his property then can I be eligible to stop such things by him i.e to not sell the property???