Easiest way to understand your home energy consumption is to look at your electricity bill. Those bills have many positions as utility companies are there for profit but you are interested in position with your meter reading or actual value of consumed kWh.
If you have day and night tariff you should have both of them separately. Keep in mind that not every bill can show actual readings and some can be estimated (to be corrected on next actual reading where physical reading of the meter takes place).
If you like to measure your energy consumption you need to “sense” what is flowing through your electrical cables. Easiest way to do so is to install clamp meter.