What is the ruling on vows I made in childhood with the intention of fulfilling them for life, and how can I be released from them?

If you doubt the continuation of the intention for a vow (nadhr), the default is the acquittal of responsibility, and responsibility is acquitted by performing the vowed act once. Vows are disliked (makruh) and do not bring good, but fulfilling them is obligatory if it is a vow of obedience.