How do i get ACTUAL electricity consumption for the whole of last year?

hello, i am trying to figure out how much ACTUAL electricity we consumed in KWHs for 2021.

is the best way to do this by taking the first reading of 2021 on the first statement and the last reading on the last 2021 statement and the difference of day and night is the actual consumption?

also, how do i work out base consumption?

i need this for getting quotes on solar installation

Make sure you use the actual reading not Bulbs crystal ball projected guessstimated ones :bulb: :rage: