Trust you are well.
I just finished KCD 1 and given the ending KCD 2 seems to be an immediate buy I was thinking of waiting out till all DLCs are released and had some questions regarding the same.
How do the DLCs integrate in the game, do they work with existing saves? and what are the release timelines

The second DLC for KCD 2 is coming out on september 9th on PS5, so it should be similar timing on PC. The third and final DLC is due out in winter/summer- depending on which hemisphere you live in (winter in the north, summer in the south) but to my knowledge no actual date has been set.