Proof for child support

I am the plaintiff in my CS case and used cse to file the complaint and get support for my child.
My question is this, I just got a job, actually 2, 1 is a contracting job and the other is with the postal service. But I won’t have a paycheck from either until well after my hearing date.(due to their hiring process and with the contract job it fluctuates.)

How do I prove that I will have employment and a paycheck? I already have proof of the daycare expense.

You may present any offer letter you received, or obtain a note from your supervisor regarding your pay structure.