Long inserters take something from 2 units away and will put it on the oposite side, also two units away.

You have the belt 2 units away, but on the other side 2 units away is not the chest but an inserter.

One way of doing what you want to do is place the left belt and the left long inserters ...

I need help with the inserters on the left not picking up coal and putting it into the chest. I have just got the game so i don't want any efficiency help i just want those inserters to pick up the coal. Ty