It is good that you come to the forum to ask questions.
I never went to Catholic schools, there wasn’t any in my neighborhood. I did go to CCD and learned quite a bit there.
Finally, as a teen a library opened in my neighborhood and frequented it and got out many books on saints, Church history, people who converted to Catholicism, and some good spiritual direction reading.
As far as staying in the faith, what helps is when you have a group of your peers who are wanting to learn more about their faith and how to grow in it. When that happens community is formed and is very helpful.
Many times when young people go away to college they don’t look for the Catholic Church in the area and enter, instead, into the temptations of bad company. That never works in one’s favor.
Prayer, study, and good community are necessary.
I’m not a young woman anymore, but I have a desire to learn more, and keep seeking good spiritual
There are many excellent bible studies in the Catholic Church. Not every parish has one, but they are spreading.
It is one thing to know the bible verses, and another thing to understand and apply them correctly.
The most important and beautiful centerpiece of the Church is the Mass and the Eucharist. We get out of it what we put into it! Jesus is truly present there and our relationship can grow inasmuch as we cooperate with His grace.