Did you figure out the electoral system used for selecting the US President? I will answer as best I can and likely will need to add links if you want more information.
From a US citizen's view, the electoral system can be seen as outdated, unfair, and unwieldy. Lots has been written about its pros and cons and whether the Constitution should be changed so that the electoral college is changed somehow or eliminated completely. Through school, even though I had plenty of lessons in history and civics, the electoral college was given cursory explanation (IMO). The most I got from those lessons was that it gave the final say in who became president based on each states' electors, selected before the election, used the state's popular vote to determine how they voted. I think that is a little idealistic. Each state gets to have a number of electors based on the state's population (why a census is so important), and that is why some states like Pennsylvania, Texas, California, Michigan, Florida and other states with large populations are allotted more electoral representatives. At this point, I do not know how they are selected within a state, which I have to assume can be political and so forth (one of the reasons given for elimination of the EC). At a given date, the members of the Electoral College are supposed to meet and enter their votes. In some, maybe most states now, the each state's electors vote for their state's choice for president based on who won the most popular votes. That is why we now seem to have "Red" (for Republican) and "Blue" (for Democratic) states so ubiquitous on maps. A state like Oklahoma, where there are now more registered Republicans than Democrats, it has become a Red state. (You can read more about the change briefly here:
https://apnews.com/article/election-2020-state-elections-oklahoma-general-elections-elections-44cd9da54c1f451c14d068adbd5e64db ). There has been a concerted effort to get more people to register to vote and then to actually vote, but there are still many who either don't register or don't vote if they do. I can't explain that except for those such as certain religious groups who do not (e.g. Jehovah's Witness).
At one time, many of the states had split electors, so that there could be a split vote that represented the popular vote, and that still exists in a few; however, at some time, the republicans while in control of states' legislatures, were able to change the state law to make the state an all or nothing. If more Republicans voted for a candidate in a state, then all of the electors were supposedly bound to vote for the Republican candidate. This is a huge bone of contention and disenfranchises the voters who are Democrats, Independents, et al. I suspect that is a reason sometimes for voter apathy or at least discouragement. That is why Oklahoma is a "Red" state--all electors are directed to vote for the Republican candidate if there are more votes for that person. It is also why there was much made this election in 2020 of republicans crossing "party lines" and voting for a Democratic candidate, which became more of a vote against Trump but not necessarily for any other Democrats running for down ticket elections (senators, representatives, etc.).
Okay. Now that you've read most of what I know from my own knowledge, you can read up on all of the information of the Electoral College:
https://en.wikipedia.org/wiki/United_States_Electoral_CollegeCheers!
