- You can drag and drop your level sequence in your world outline so now it is a level sequence actor
- Then in your blueprint you get a reference to that level sequence actor:
either you set it up your self with variables - you make a levelsequence actor variable in your blueprint, and in the details of the blueprint actor in your world outliner you reference to the level sequence actor-
or you do some code to query it - then you can perform operation on your level sequence actor, like play.
Regarding breaking down the animations, I am not so sure, that will probably be some copy paste of animation track in new Level Sequence Assets.