Majority of Command of Shariah is clear and anyone can understand these commands. However, certain commands and its correct interpretation requires an intensive and extensive study of both the sacred sources of Shari’a, which cannot be undertaken by every layman. If it is made obligatory on each and every Muslim to consult the Holy Quran and Sunnah in each and every problem rising before him, it will burden him with a responsibility which is almost impossible for him to discharge.
فلولا نفر من كل فرقة منهم طائفة ليتفقهوا في الدين ولينذروا قومهم إذا رجعوا إليهم لعلهم يحذرون
So, a section from each group of them should go forth, so that they may acquire the knowledge and the perception in the matters of religion, and so that they may warn their people, when they return to them, that they may be watchful.
This verse of the Holy Quran indicates that a group of Muslims should devote itself for acquiring the knowledge of Shari’a, and the others should consult them in the matters of Shari’a.
2.The other Solution some one may use not to follow any person of understanding/Scholars to do according to your own understanding that will obviously will be Nafs Parasti.