If you wanna serve God but you don’t know what to do I can tell you what you can do
example: Me and my sister are helping a missionary for children and we are responsible for the music.
1. just giving money to the poor is good and telling them Jesus loves you.
2. giving someone a drink that does not have any thing to drink and telling them Jesus loves you is good.
3. helping people with there homework, just being nice by telling them about Jesus.
but you can do so much more you can teach them soccer and tell them about Jesus at the same time.
but as long as you tell them about Jesus you are serving God.
And it does not matter how old you are you can be 6 or 7 or 8 or 67 it does not matter how old you are. cause God wants everyone to tell people about Jesus 🙂
Philipians 4:13 I can do all things through Christ who strengtheneth me.