The most important thing is for us to love God and love our neighbor.
We must plant and nurture faith in Christ, practice repentance and forgiveness, make and keep covenants with God, and learn joy in sustaining it.
The rest of it will work its way out. Just like Pres Hinckley would say.
Sometimes we can get hung up on a teaching that is hard to understand, or we can doubt that God's mercy applies to ourselves. We can let go and let God.
Let go of doctrines that don't make sense or are hurtful to us. We can let go of doubt and despair. If we let his love reach us, and change us with our consent and effort, every thing else will work out.