Get some bare basics secondhand. Your local thrift stores will have various things you need for a few dollars. You don't need much right now, but something like a small table and comfortable chair. Yard sales are another option. People want to get rid of it, and a small desk might be $10. Worry about more furniture and appearance later on. If you don't have basic kitchen utensils and dishes, any discount department store should have them fairly cheap, even if you get a plastic picnic set for now.
If you have a little bit of money to spare to make your new place livable, wait for Black Friday sales next weekend if you're in the US, assuming you can shop online or get out. Online you'll be able to easily find coupon codes for free shipping at stores like Kohl's or Target if it's not offered with their current specials. If you don't have a toaster, microwave (BF sales have cheap ones. Not great, but will suffice for now), towel set, pots & pans set, that's a good time to pick those up. Unless it stays very warm where you live, get a couple thick blankets (again, cheap this time of year) or a bed-in-a-bag set which often run about $20 on sale. These things aren't going to be heirloom quality but will get you by for a while.
Avoid credit cards if at all possible, or at least until your financial situation is more stable. Using and paying off every month is good, but not if you're unsteady with bills at this point. Download a basic programme to document your spending and bills, and it's a lot easier to keep track of. Way back when we had checkbook-balancing, but anymore it's far too easy to lose track of debit card spending and upcoming bills especially when automated.
When you can, get an all-purpose cookbook. The most basic and thorough I've ever seen is the classic Betty Crocker or Better Homes and Gardens cookbooks, which have everything from basic kitchen tips and relatively simple recipes to more involved traditional dishes. Far better than referring online for every little thing. There are endless simple possibilities you can make relatively cheaply with fresh or dried vegetables (like baked potatoes? buy yellow potatoes and "bake" one in the microwave for 3 minutes each side). You do NOT need soda, alcohol, several varieties of snacks, etc. Pizza is fine on occasion but cheap frozen, not more costly delivery.
You're not an idiot, the fault lies with people not preparing you for life on your own. High school classes phased out relevant home economics and similar classes, so that hasn't been helping in the past 20+ years. No one in the world just magically knows everything, and there's no fault in looking up or asking for advice. Best of luck with everything!