I truly admire your son for applying himself so diligently to your family's (I presume) faith
But I should like to seriously point out that the important question is -
-"Does he know the Lord Jesus personally?" Has he received an inner knowing from Jehovah's Spirit that he has been forgiven, cleansed and accepted as God's child, safe for eternity in God's Love, providing that he keeps loyal to his first commitment.
Many have head knowledge and have mental agreement with the doctrines of faith, but the life of Jehovah within us comes in a personal meeting and relationship with God, through Christ.
I studied the Bible as a child and sat exams, learned verses by heart, but I was 15yrs before I knew that by a prayer of faith and repentance, I must sincerely invite Jesus to be Saviour and Lord of my heart and life - Wow! What a wonderful change this dynamic and pivotal prayer brings! It births a great joy and sense of security in God's Love!
Now I sense God's Loving presence and guidance (though we can struggle with sensing specific guidance)
I pray that you and your loved ones have this spiritual inner awakening, you deserve it!
All believers must all make this one huge prayer, to make a personal Covenant with Jehovah. He does his part, but we MUST do our part. The ransom sacrifice of Jesus enables this pact (Covenant) to work and make big and wonderful changes in our life!