Joel 2:28 (AMP)
And afterward I will pour out My Spirit upon all flesh; and your sons and your daughters shall prophesy, your old men shall dream dreams, your young men shall see visions.

You are too young, too old, or not old enough are some discriminatory measures and limitations placed on us by society.
We’re told what we can and cannot do because of our age. So, it’s either you’re immature or too mature, make up your mind already!
In every sphere of society, there is an age requirement for certain activities such as driving, drinking, and having a job but in God’s kingdom, age is unnecessary.
I Timothy 4:12 says we mustn’t despise others or be despised because of our youth (age), youth should not be the time of sowing wild oats, wasting life in the guise of enjoying life, the early, young strength of youth should be used for living and witnessing for Christ, youthful vigour should be used for serving the Lord and as an example to even older mature Christians who have become lethargic in the service of the Lord. Ecclesiastes 12: says we should remember our Creator, the Lord in the days of our youth.
God has plans to use anyone, young, or old-He may use us in any way, in everyday things or big special things, but be sure that God can work in and through anyone at any time.
Each age has its own experiences and adventure, according to Proverbs 20:29, agility and strength is evidenced in young people while older people express prudent counsel and wisdom gained from life’s experience. Unfortunately, wisdom is not always the privilege of age according to Job 12:12, a young person may be wiser than an older person in most cases.
In today’s world, the young ones and youth are excluded from the serious work of the ministry because of their age or immaturity, but Christ admonishes us in Matthew 19:14 that only those who act like children, with child-like faith, the humility of spirit and great expectations is heaven reserved for, that it is only such “children” that can receive from the Lord. Christ loves little children, young people, and the youth because he loves simplicity and innocence; he sanctified every age by passing through them himself.
Daniel was in his teens when he was taken into captivity and an attempt was made to strip him of his Israelite identity. Sound a lot like our school system today? He stood his ground, refused to defile himself and the Lord used him to affect change in the entire palace, Daniel 1.
Jeremiah laments his inadequacy for public speaking when at 17 years old, finds himself called into the position of a prophet because of his young age in Jeremiah 1:6, but God doesn’t let him use this excuse.
Esther was in her teens when saved her nation. Facing death herself to confront the king. Esther proves that teenagers can change the world for God’s kingdom, even when the world seems to want to wipe out that kingdom.
Josiah had a terrible father who led Israel away from God. But at 26 years old in 2 Kings 22:3, he repairs the temple and the Word of God. During his reign, the kingdom turns back to God.
How about David, Joseph, Mary, Samuel, and many more whom God called and used regardless of their age.
God promises to pour His spirit on all flesh, age is not required, don’t let your age limit you from receiving from God.
Shalom