Welcome to your new addiction. You should avoid trying to be completionist on a single playthrough, that won't happen. Yes there are 2 sides, basically good guy or bad guy and while you can make choices on both "sides" in order to get the really spicy choices for either side you need commitment, which makes sense doesn't it? After first few episodes of the game the side you lean on with Major Choices will be locked in and your "personality" will be represented by your permanent affinity.
This is the devs passion project, all the attention is on this, but updates come out basically annually (and heading towards bi-annualy if I am honest). However updates are fully developed, polished, tested and quite sizeful. If you like to dip your toes in many parts of the game you will feel it, if you want to focus on a specific love interest you might feel the time spent developing does not match what gameplay you were able to enjoy.
This game is about discovery, try different things, but I recommend you first try to get through the game at least once no matter with how many imperfect choices you make just to get a feel for it. Then when you will play it again not only will you unlock more content you will understand where you have to steer your ship so to speak at any given time. Veterans of this game could play it blindfolded and show you things you did not even know exist. Some people discover new things in first episodes of the game even after playing it for years.
Like it or not, this is peak adult game this industry can offer. Enjoy!