Understanding Josh

I have been trying to write the next chapter of this novel for the last three days, yet all I have to show for it is a few decent paragraphs. I guess its at least a start, but I just wish I had more. I might be trying to push too much or I'm just not making enough time for it to flow. I read a bit from my book of exercises, do an exercise, then not much else. I need to then immediately startn on the novel. I am not spending enough time with my characters. I need to get to know them again especially since Josh has developed a mental disorder. I need to get to know the adult Josh. When I began writing with these characters, most of the story was Josh growing up though more and more of the story is his adulthood. I think the story is essentially about him as an adult but I had to write about him as a child in order to understand why he is the way he is.