I am also a calorie counter, it works for me

. That, coupled with slowly changing out junky calorie choices for healthier calorie choices, adding in more water and cutting out things like alcohol and soda, are easy and progressive ways to better your diet without a drastic change. Instead of a grilled cheese and fries, why not a turkey sandwich? Instead of soda, get water with lemon. If you must have alcohol, limit it to one drink you love rather than three you don't, you know? Do basic plate dividing - half your plate to veggies and fruit, a quarter to a nice complex starch like brown rice, a quarter to a decent quality protein like beans, lean steak, grilled chicken, or even something like chili or a casserole.
You have a lot of flexibility with calorie counting that can make it cheap and healthy (our food budget is very tight, I do understand!). But the bottom line is that you need to know how much you are eating to give you a baseline for how to improve. Journalling your food intake and keeping a running calorie total is a versatile, non-finicky way to do it. As Krampus said, you can fill those calories however you choose, and that is well suited to cafeteria eating.
You can do this, but it does take mindfulness and either eating WAY less of the junk, in terms of quantity (so it stays within your calorie budget), or eating a ton of food that is healthier and lower calorie (thus filling you up without breaking the caloric bank). If you can't manage either of those, you're not going to be able to lose weight. Weightloss depends on a calorie deficit, and you have to create that in whatever way best suits you, but without it you WILL gain.
You have control over this, small positive choices add up to big rewards
