How detailed do you desire to be? An excellent Examination of Conscience is all one really needs. One of the best is by Fr. Robert Altier. It gives excellent guidance on what constitutes mortal and venial sins, as well as helping to identify "imperfections" which are not sins at all, being inherent to our broken human nature and not conscious sin. Imperfections are frequently confessed, but are really only an admission that we are human. Catholics do not want to lapse into scrupulosity - and it is a substantial problem today.
I mention all of this as 1 in 5 Westerners suffers from some form of anxiety, of which scrupulosity is one manifestation.
I had begun to think that scrupulosity was kind of dying out, with the relaxed approach to sin that emerged after the Vatican II era (as I always say, not necessarily assigning causality, just establishing a time frame), but it seems to be making a comeback from what I see on Catholic online forums. I have to think that it comes largely from people who have never been taught how to think about sin correctly, and when they "get religion", they don't know how to handle Catholic morality and they start seeing sin where sin doesn't exist.
One pernicious error I see bubbling up in recent years is the idea that grave matter abounds (it really doesn't, it's pretty cut-and-dried, for average people much of it comes from the Sixth and Ninth Commandments, because human nature inclines to seeking liberty in such matters), one idea that has gained currency is that any sin against one of the Ten Commandments constitutes grave matter. It does not. The concept of parvity of matter is something else that has been lost today, again, this was once part of a Catholic's vest-pocket knowledge.
Another error, and I've seen this coming for almost fifty years now, is the reluctance to speak of
mortal sin. More to the point, there seems to be a notion afoot that you can commit a sin involving grave matter, with sufficient reflection and full consent of the will (you know it is grave matter and you do it without any coercion or internal compulsion), yet your salvation is not in danger, such that a wedge category is introduced between venial sin and mortal sin, and "mortal sin" is something that is so horrible that only very evil people do it ("not Hitler = heaven"). You could think of it as pushing the Overton Window as to where mortal sin, sin that is so bad that you could go to hell for it, becomes something very rare. This, too, is a modern error. Mortal sin can be, and is, indulged in very easily by those who seek liberty in matters of the flesh, and then by its nature it becomes addictive, such that one cannot easily break with it once indulged.