I think it's great that your sodium levels are so low. Keep in mind that as you exercise, having sodium in your diet is a good thing though. It helps your body hold on to some water that your muscles will need. I think 2000mg/day is maximum recommended. You don't NEED to raise it to that, but don't be afraid to add a little salt if you like
Your protein definitely needs to come up. More chicken, turkey, egg whites, fish (tuna, salmon, halibut). If your sugar stays where it is, that's not really too bad. You'll want to bump your carbs up a little too (unless you ARE attempting Keto?)
You might want to consider swapping corn for a different veggie. Something green would be best.
Also, your last snack (the cheese and nuts) is going to be, I assume, mostly fat. I would consider a snack that is high in protein and low in everything else. Beef jerky is a good one if you like it
On the plus side, starting to track it is a good step in the right direction. This won't just happen right away. When I first started dieting, it took me months of really understanding what I was doing. And even now that I know, it usually takes me a couple of weeks to iron out my diet to where I like it. Just be patient, and we'll help