All that is necessary is to change enough to stop doing whatever the sin is.
It's not necessary to have an emotional catharsis.
Forget the "aridity" issues and the "Dark Night of the Soul".
If you get off the bus after work and walk past a gin mill and go inside and get drunk and spend your paycheck ... then all you need to do is to get off the bus a couple of stops AFTER the gin mill and then not be tempted to stop at the bar for a few drinks.
If you steal from a certain store, then do not go into that store.
if you get into fights, then avoid the place and the people where and with whom you fight.
If you drive too fast, say Hail Mary's when driving ... and you WILL slow down.
I saw a book title once, "Change Your Mind and Keep the Change". Don't remember the author. But you could look it up.
It's about "pattern interruption" ... changing a few of the patterns of your life.
On the other hand, it's not necessary to make a full public confession and hang your dirty laundry out to upset the neighbors.
You don't need to make speeches or wear drab clothing or walk around with your shoulders all stooped over. Or make a pilgrimage to Rome or Jerusalem.
Work on your prayer life.
If you do change your patterns, then, also, create some new patterns ... Make a tour or set of tours to find various Catholic churches near where you live or work. Collect their bulletins with their schedules of Masses and social events. One had an open meeting on re-evangelization ... so I went and just sat in the back. Since I was a new face, several people came over and invited me to partake of the refreshments. A few years later one of the people ended up as a Cardinal.
So, you just never know.
Make it a new hobby to spend some time each day at church, either praying or reading or just staring at Jesus in the Tabernacle or Jesus in the Monstrance. One day, I was doing that and the church organist saw I was new and gave me a five minute tour of the church building showing me some delightful architectural features that few people had ever seen ... on the outside of the building someone had carved in stone all of the major events of Jesus' life. And the little carving high up on the wall that showed Jesus' Ascension into Heaven, you could see a cloud and Jesus' feet sticking out as He went up! It can be fun and doesn't have to be all mopes and frowns.