How do I raise obedience? Seems like whatever I do they barely gain any obedience
Have you checked any of the guides on this thread yet?
If the guides are not clear, just keep the following things in mind.
-Their taming, awareness, fear, mood and later devotion will positively affect their obedience to you. Raise those by successfully making them do activities, follow rules and praise/punish them properly and moderately will slowly increase it over time. This also means you have to find out what activities and training they are willing to do at what stage.
-Giving them clothing like the sundress and slippers will help with mood.
-Praising or punishing them too often (or neglecting to punish or praise) will spoil them or make them despair respectively, both of which will reduce obedience instead so make sure to keep these stats to 0 at all cost. If it increases then you can try putting them in their place or cheer them up (only up to a few times)
-Some of the accessories, rules as well as the brand tattoo will help this too. Anything that would remind them of their position as a slave helps.
-Make sure to buy slaves with low nature and pride since that will lower obedience too.
-Lastly, they're also more obedient to you if you yourself(the character, not necessarily you) are happy, dominant and attractive.