Here is a list of my favorite resources across the web:
BMI Calculator
https://www.nhlbi.nih.gov/health/educational/lose_wt/BMI/bmicalc.htm
Some resources for young (but not only) parents
https://www.nhlbi.nih.gov/health/educational/wecan/index.htm
Some recipes
https://therealfooddietitians.com/
Some more recipes (choose the healthy ones)
https://www.allrecipes.com/
How to read food labels
https://www.healthline.com/nutrition/how-to-read-food-labels
https://www.hsph.harvard.edu/nutritionsource/food-label-guide/
Also some official advice on reading food labels
– a short one and a complex one
https://www.cdc.gov/diabetes/managing/eat-well/food-labels.html
https://www.fda.gov/food/new-nutrition-facts-label/how-understand-and-use-nutrition-facts-label
Food nutritional content
https://www.nutritionvalue.org/
A different (global) perspective on eating
https://eatforum.org/
Nutrition facts
https://play.google.com/store/apps/details?id=com.nutrition.facts