Weird job hiring process sketchy job.

I applied at this one place they are a local small business they are only offering $13 an hr in 2021 in California I decided to come in yesterday from 1-5 but it all seemed sketchy to me I'm not even on the payroll yet, I have no official hire date to start, no w4 or i9 forms to sign no one has looked at my i.d or social, they want me to come back today and throw me onto a day's work but, I'm not even getting paid yet, I'm not officially hired I was told that depending on my speed of how fast I can work that they'll decide if they give me a call back to get hired or not? I find it all sketchy I've never gone through this type of "hiring process" before it's just weird. Like oh, you want to use me to work for a day or two then you might not even call me back? Seems sketchy af to me.