I was just like you about three years ago, even the same age.
My desire grew by reading. Read St. Gemma’s diary or Father Schouppe’s books on Purgatory and Hell. St. Faustina’s diary was reallyinteresting too. Currently I’m thinking about picking up He and I by Gabrielle Bossis and The Sinner’s Guide.
If you want to take your faith seriously, act like the saints. Imitate them. Read their works and follow suit.
I also like the Latin mass. I recommend reading about it. A vast majority of the saints attended mass in Latin! It’s called the Mass of the Saints for a reason. If one is near you, I suggest you try going. Just know that you don’t have to know Latin, but there are often Latin to English translation missals in the back.