Do your best for Him and be kind to others. When you fail ask forgiveness from them and Him.
That is all you can do. The rest is up to Him. He is pleased and undue concern after that does not honor His place.
Pray and share with Him feelings suitable or unsuitable. He loves hearing prayers.
Read scripture, use it for encouragement and guidance.
Meditate on the Goodness in life.
Warriors of Light know that they win their battles by taking orders only from their Superior. They use Trust and Gratitude to dust away fear and doubts.