God wants to use you to make a difference in His world. He wants to work through you. What matters is not the duration of your life, but the donation of it. Not how long you lived, but how you lived.
Abraham was old,
Jacob was insecure,
Leah was unattractive,
Joseph was abused,
Gideon was poor,
Samson was co-dependent,
Rahab was immoral,
David had an affair and all kinds of family problems,
Elijah was suicidal,
Jeremiah was depressed,
Jonah was reluctant,
Naomi was a widow,
John the Baptist was eccentric to say the least,
Peter was impulsive, and hot-tempered,
Martha worried a lot,
The Samaritan woman had several failed marriage,
Zaacchaeus was unpopular,
Thomas had doubts,
Paul had poor health, and Timothy was timid.
That is quite a variety of misfits. But God used each of them in His service. He will use you, too. The mature follower of Jesus stops asking, "Who is going to meet my needs?" and starts asking, "Whose needs can I meet"