This is good, one thing to note is that if you commit a sin which is grave matter, not meeting conditions 2 & 3 it doesn’t mean that the sin is merely veinial. It’s still grave matter, it still requires confession prior to receiving communion (when you become aware of the sin). It is in fact possible for a sin to be grave but not mortal.
Venial sin’s don’t require confession prior to reception of communion, they are automatically forgiven durring mass.
Venial sins are only forgiven (e.g. during Mass, or on receiving Communion, or by any prayer) with the correct intention on the part of the participant.
Terminology is not doctrine. The terminology that you are using is fine; but other terminology is also fine.
A sin that does not meet all of the three conditions for an actual mortal sin, but which has a grave matter, is correctly called an objective mortal sin. An objective mortal sin is an act that is objectively gravely immoral.
“Considering sin from the point of view of its matter, the ideas of death, of radical rupture with God, the supreme good, of deviation from the path that leads to God or interruption of the journey toward him (which are all ways of defining mortal sin) are linked with the idea of the gravity of sin’s objective content. Hence, in the church’s doctrine and pastoral action, grave sin is in practice identified with mortal sin… some sins are intrinsically grave and mortal by reason of their matter.”
JP2, Reconciliation and Penance, n. 17.
Also, only a person who is conscious of having committed actual mortal sin (without yet having been forgiven in Confession) is prohibited from receiving Communion. If a person committed an objective mortal sin, but without sufficient knowledge or full and free consent, then he has not committed an actual mortal sin, and he may receive Communion. This is clear from the teaching of Pope John Paul II in Reconciliation and Penance.
If a person is conscious of grave sin (actual mortal sin), he may not receive Communion
unless there is a grave reason and no opportunity to confess. In which case he should make an act of perfect contrition, receive Communion, and then go to confession at the next opportunity.