It's ok. Recently had my first ever Buddhist campaign in 1.15 as Ayuttha. I'm a pretty slow player but I can understand how the religious mechanics can be frustrating for blobbers. Added my own personal restriction to keep the karma meter under 50 in either direction as well which made it a bit challenging. Its so tempting to gobble up territory after a victory but that will just sink your karma.
The trick is how to get called into wars by allies and use POI to get rewarded territory. Plus when you are warleader its nice that you can release nations for 0 dip in peace deals. You have to plan spitting out a small nation after a victory, raise relations to +100, wait for original country declare reconquest then use enforce peace to nab additional territory without any karma cost. Or release nation which goes bonkers on previous overlord and takes additional territory, you then declare on release nation, return some territory to old enemy while nabbing a province or two for yourself.
I was able to get White Elephant achievement while following those general guidelines. Then last 50 years I said screw it, let's eat up Ming! Rode -100 karma the rest of the way while I wiped them off the map.