How about Characters, I somewhat get them; meaning I know what all the skills mean. And how to pick out a good general/governor/official/researcher etc. But to be blunt, I don't get what the point is with all the women. (geese that sounds so wrong lol)...
Anyways, I also don't pay much attention to who wins the elections. Because to me I feel like I can do very little to influence them, and I feel Ican just ignore them and I won't have much in the way of consequences. Is that a false assumption?
What can I do with people who is not any sort of office holder/gov./gen.?
When IR first came out, I saw the dev clash and saw people seize funds, ransom, etc. characters from other nations. But for the life of me I have no idea how they did that...
What should I do with the families of my subjects and conquered enemies when I annex them?
Roman Republic is a lite form of a Republic.
You can ignore Characters and elections and you may be fine, or you can play the political game and enjoy a lot knowing your nations chacters.
In Monarchies, people like to look for blood lines so their dynasty get better with every bloodline.
For Republics if you do not go the Dicatorship path to the Empire, you can balance power base to decide the party that dominates the Senate and this way be able to choice your next Consul.
The idea is to follow your Heads of Family, because they are the characters that have more Power Base and see which faction they have more conviction. You want to send them as governors of small regions to negate their senate influence if they are from a faction you do not want in power.
For the election, look at the characters menu and sort by the election succession score. You will see that popularity, family prestige and statesmanship are the factors that influence the vote for that character. Every faction will support their best characters.
To elect a character you want to have their faction with a senate majority and him being more popular, having more family prestige and statesmaship than his competitors.
To do so, you have to teach/give experience to your chosen characters when they are young, so they can get statesmanship and popularity (as governors, legates, researchers or officials) and adopt them in one of the most prestigious families.
Some players choose to always please all families giving them enougb jobs so they are not scorned. But you can chose one family and give as many jobs to them. The heads of family power base is function of family prestige that they get mostly by holding offices by family members. So you can permanently scorn a family and not let them gain prestige while at the same time promote another family to power. Is up to you.
Finally, what faction do you want in power? That will depend in your playstyle, read on the wiki what the boni, populari and the optimates want, you want a faction that will approve what you do as a player
https://imperator.paradoxwikis.com/Government#Roman_factions
Also, remember that characters can change their faction conviction with time, look at how is changing to understand why and when they will change.
The political game is time consuming but helps a lot to know the characters of your nation.
Do not forget that you have to play the other aspects of the game, too! As this grooming of characters and political bickering can absorb all of your attention.