Staggered Instance Animation (geometry nodes) Help

I’m working on a dataviz project in geoNodes. The animation is based off values imported as attributes from a CSV. I have instances appearing at different frames based on data from the attributes. I’d like to have a translation animation start when each instance appears, which I’ve been having trouble accomplishing. Their appearance is controlled by setting the selection on an instance on points, so basically i want to know when an instance is within the selection, and start animating at that moment. I’ve linked to a simplified version of my blender file. Appreciate any help y’all can offer!!
Anim_help1.blend