August 9th. One month from now. Your songs don't have to be perfect, they just have to be made. Submitting a rough idea is better than nothing. Depending on how long people take to do things, maybe there could even be a revision after that before it's finalized.
But have something presentable by August 9th.
Some people have busy schedules. Some people are work methodically. Others are still learning the tools they'll be using for this. But in one month, you should have something.