Post-click analysis and % lost (non-converting) users?

Question

contextual advertising

Good evening!
Today I ran into a problem with post-click analysis.
The task is this: to conduct a post-click analysis, build models for different attributions, identify the % of users who did not make conversions and build the dynamics of the distribution of purchases.
I’ll be honest: this is the first time I’ve solved a problem of this kind and I don’t know much about this issue, so I’ll be glad for advice on what articles you can read about campaign analysis.
But the question is: how to track the % of users who came from ads, but did not take any targeted action.

Answer 1

for an adult - about 3-7 thousand rubles
for a child - see from the ppc source who is where

Answer 2

prepare the segment "came from advertising, did not buy" by analogy with the screenshot and analyze