Judicial Services ke liye Family Law mein confusion ka solution

Brothers and sisters, hum Judicial Services ke liye family law study kar rahe hain, lekin kuch concepts toh itne confusing hain ki. Mujhe seekhne mein lagta hai ki Guardianship of Minor aur Custody mein kya faraq hai. Koi bhi bataaye ki Guardianship kya hai, phir bhi Custody ki zaroorat kyun hoti hai? Guardianship kaise Guardianship hota hai, Custody kaise Custody hoti hai? Dono ke liye Court ki role kya hai? Aap logon ko please kuch light bhi aazmaaye.