Before you start, it's important to think about your budget in this context:
You will have some expenses that are non-negotiable. You need housing (with the included utilities), you need food, you need healthcare, and you need some way to get around. In some cases, such as child support, you have other expenses that need to happen every month. If you can, try to also include savings in this category.
You will have other expenses that are negotiable: While we all want to eat out, go shopping, have all of the streaming platforms we desire, and immediately adopt a pet when we move out on our own, these are the expenses that we need to prioritize based on our income that is left over after paying for our non-negotiable expenses.
This is not meant to be shaming! However, sometimes finances in your life immediately after college can be difficult, and I am speaking from personal experience. I was in AmeriCorps for two years after college--since it was a service position, and not a "job," I received a living stipend, and not a wage. Altogether, it came out to about $6.50 an hour. I needed to learn to budget very quickly! I was able to take advantage of SNAP (aka food stamps), and that fortunately covered my groceries for a month. I was forced to pick and choose those negotiable activities very carefully, though, and learn how to check off those recreation and entertainment categories using free community events going on around me.
Deep breaths...you can do this!