It might help to buy some measuring devices or change the settings on what you use. For example, to help you use metric units, you might change your weather app to Celsius, switch your bathroom scale to kilograms, buy a 1-liter water bottle, and buy a meter stick. Scales and weather sensors are easily available at Walmart or Target. Meter sticks are available on Amazon and elsewhere.
If you haven't looked at it yet, see the page about how to learn the metric system for the right approach.