If your parents were married in the Catholic Church, then your father agreed to raise you as a Catholic. You should follow Catholic practices.
To confess, the priest will help you. They are busy, if nothing else, so make a list of your sins and the number of times for each, and just read the list – not a list of excuses – the priest has no time for excuses. Pope Francis says that the confessional is not supposed to be a torture chamber, so don’t make it one for yourself.
Tell the priest if you have a habit of committing certain sins.
Everything is not a mortal sin. The priest cannot always tell you if a particular sin is a mortal sin on your part, without asking some questions.
Confession-- in and out in less than five minutes, maybe. Try to work on those bad habits, OK? It may help to find something to do instead of committing that sin. Listen to Catholic music on youtube so those hymns are running through your mind. Be HOLY.