St. Alfonso Liguori said that if you live further away from church than a fifteen minute donkey ride, you are excused. And that was in the tough old days.
Obviously you should go if you can reasonably do it. But if you can’t, make a spiritual communion and be patient.
And do not be too hard on your parents, as laborers who are too tired have also always been excused from the Mass obligation, just like people who are sick.
RE: confessing Mass absences, I think this is a confusion of two things. In areas where people live close to churches and see their priests every day, it was usual to ask your priest to be excused from Mass, every time. (And often at Confession, because you were already talking to the priest.) In areas where priests were not living close, it was more customary to get permissions well ahead of time, or to be told by the priests to assume you were excused in all similar cases. Neither way is right or wrong; it is just custom.
If someone does not have the condition of scruples, and wants to know if X or Y is a sin, there is no harm in bringing it up at Confession. If it turns out it is not a sin, it doesn’t count as confessing it; and your heart will be lightened. But if you do have scruples, obviously you should do whatever your confessor has told you, just like following a doctor’s prescription.