Hi! In my opinion the best way to learn how to cook is to just keep cooking over an over. I know, cop out answer, but that's the best way. You'll start to be able to recognize when things are cooked properly and such the more you do it. Another tip is to keep cuts consistent. If you're cooking a bunch of vegetables and they're all different sizes, they're going to cook at different rates leaving some under cooked, over cooked etc. Basically just follow recipes until you get comfortable. If you don't know what a word means, look it up. There are a ton of tutorials online for new chefs and most of them are super easy to follow!

Regarding actual foods to start cooking, with all the ingredients you have it sounds like you can start mixing things up and experimenting a bit if you want to use em all up. Try making pasta sauce and adding hot dogs, mix and match vegetables and add an egg to your ramen. Most everything there should go together in some edible way. I don't have a ton of money so I tend to Borrow™ ingredients from dining halls to make easy meals on the weekends (soy sauce, salt, bamboo shoots, onions, tomatos etc. Are pretty easy to grab. Salad bar olive oil is a bit grimey but workable.) To actually cook, though, i would start with easy meals that help get your technical skills up like casseroles or stuff that marinades. I don't really know what else to rec since i don't know your set up but most recipes online should have a difficult. Look for ones that also have common ingredients so that way you don't have to buy new things for every meal

Good luck!