Workforce housing interview?

I have an interview at the end of the week for affordable/workforce housing. It’s for a 2 bedroom in California (southern). I just did my taxes today and trying to scramble to get together and print all then necessary paperwork.

I’m head of household, pregnant, have a 1 year old, and I work as a caregiver part time (started 6months a go). But I don’t have paystubs as they pay me cash and it’s private. How do I prove income if I just started and have my 2019 taxes done through H&R Block?

Anyone go through this interview and tips? I’m so nervous! I really need my own place since I have 2 kids and a hubby!