Tax question !

I know it is kinda early but I’m unsure I should file this year. I have two kids who live with me full time, I pay 80$ a month in child care, I’ve worked at 3 jobs this year. My first I made 1700 in total earned income, no federal or state tax taken out.

Second job I’ve made 1300 total earned income. (still working there only make 140 every two weeks) no federal tax being taken out, but have maybe 300-400 out in state tax. And job I have now. Total earned income is 2883. Federal 150$ and state about 30$.

Also at the job I’m at they take out money for Medicaid and oasdi

Would it be worth it to file and about how much would I get back and could I get the child tax credit.

This will be my first year and I know absolutely nothing !