Have you not known, have you not heard that the eternal God is Jehovah, who created the ends of the earth? He does not faint, he does not wear away with weariness, and his understanding has no one to reach him.
He gives effort to the weary, and multiplies strength to him who has none.
The boys become weary and tired, the youth falter and fall;
but they that wait for the LORD shall have new strength; they shall lift up wings like eagles; they shall run, and not be weary; they shall walk, and not faint.
Isaiah 40: 28-31
If you are tired, and you do not have the strength to follow, remember that God always keeps His promises, follow Him, love Him, honor Him, and see how worries, problems and everything that overwhelms you goes because God is with you, He said it will strengthen you and you will.
Trust in God and he will take care of all the rest, do not worry, God is your creator and very merciful, do not be afraid to trust, you will see and you will realize all the work that will do in your life.