Post processing is easy to set up. Just create a layer for post processing, then create a empty game object and add the post processing volume to it, set the volume and add the camera a post processing layer. In the post processing layer component assign the post process layer u made before and that's all. 

For coding, u just need to learn, in this game jam you can learn a bit, but as long as u learn u know more bout coding. You can check out tutorials of unity by brackeys or others.