low sodium = low calories...

I'm on a new venture to try and reduce my sodium intake after realizing last week that my sodium intake was way too high... I adjusted it and immediately I've drop almost 6 lbs (in 3 days) just from getting my sodium back in check. So now I'm trying to come up with low sodium ideas for meals, but I have two big problems... 1) I'm kind of a picky eater... I'm slowly starting to try different foods but I've been a picky eater all my life so its a slow process for me to branch out and find healthy foods that I like... 2) my BMR (currently) is around 2000 kcal/day, my TDEE is closer to 2400 kcal/day. My goal weight BMR is around 1800 kcal/day, so I've set my goal at the 1800ish and I'm having trouble eating enough food that keeps me under my sodium goal while still getting at a minimum my goal weight BMR (not to mention my current BMR, or my TDEE)

I have classes mondays and wednesdays so trying to come up with meal ideas for days that I'm not home to cook.... I always eat 2 slices of peanut butter toast for breakfast, and adding in a cup of cheerios and 1/2% milk (about 650 kcal for breakfast), I normally eat a slim fast meal bar and approximately 100 cal snack for lunch (about 300-400 kcal for lunch), then I'd eat the rest for dinner, but now I'll probably switch my small meal to dinner and have to start eating more for lunch since I at least have a refridgerator and microwave available at work... just planning out some meals for this week and I'm having trouble getting my calorie goal while not going over my sodium goal...