What to do next? Custom Empire CK2

So I’m playing as Georgia, it’s 120 years into the game (1066 start), I’ve conquered Armenia, and Alania, my first character Bagrat was canonized as a saint, and my 3rd heir Zurab forged a philosophical blood line, im rolling with 3 bloodline bonuses now. I’m building a royal palace in Tbilisi.

Currently I’m a 7 year old, son of Zurab (after his first son, died tragically in a feast related incident at 41). He’s the first true Georgian emperor after his father managed to live til 78 to pull off the 8k prestige needed to forge.

I’m making 47g per month, and most of my problems in past play throughs are all but gone in this one (money, levies etc)

But for the first time, everyone hates me. I know it’s title related but I’m struggling in which titles I should keep and which I should give away.

If I give away duchies, do I get less levy, less money? Am I willing to have more of both this play through and have less opinion?

As I scale my empire going forward I’m giving away titles and duchies, but I’ve controlled 13/12-13 plus like 5 Dutchies all around my capital, I’ve pumped these counties with upgrades while leaving my counts with nothing, I’ve quelled every rebellion easily.

I don’t want to end up as the byz, and have endless rebellions. What do I do now that I’m an Emperor with a empire pumping at full steam, how do I keep my power and boost my subjects happiness in the best way possible, im new to any sort of structure outside of Christian feudal king, so viceroyalties etc are new to me.