God has given believers the Holy Spirit to guide. Correct interpretation with the help of the Holy Spirit leads to greater righteousness in life which is the main indication that one is on the right track.
That doesn't mean one will not err...all are human.
However, those who have faith and are obedient to the Holy Spirit will continue to follow a correct path whether that means interpretations made on one's own or whether that means listening to others' interpretations.
This applies not only to Bible reading but to all areas of living.
Is it possible for a non-Christian to experience righteousness in their life? Who measures that righteousness, is there a way to know if one is or isn’t righteous?