How does one go along with giving up their free will to God’s will?
By keeping God’s commandments and adhering to the teaching of the Catholic Church. God’s will is made know to us through the teaching of the Catholic Church. An excellent source of this teaching, of course, is the Catechism of the Catholic Church.
God is also inspiring us constantly with His graces and our part in this is to try not and resist those graces. However, God’s graces can appear to be undetectable most times though He is working in us at all times. If you try and keep God’s commandments and adhere to the Church’s teaching, you will be doing God’s will.