Some ideas. I’m sure others will have more.
Study and practice cultivating Christian virtues (there are many overlapping virtues, such as faith, hope, love, justice, prudence, moderation, courage, humility, generosity, compassion, mercy, self-control, respect, chastity, honesty, forgiveness, gratitude, zeal, etc.). You can break it down somewhat if you need to: You could spend one week focusing on respect, for example, and another focusing on compassion. That doesn’t mean you stop respecting people when you start focusing on compassion or honesty. It just gives you a way to focus your efforts.
Periodically throughout your day, pause to observe where you are and what you are doing. Will your current activities help you to cultivate the virtues you want to attain, or make it harder to attain those virtues? When that question is answered, act accordingly and say a prayer of thanks to God.
Start reading the
Catechism of the Catholic Church, or at least the
Compendium of the Catechism of the Catholic Church. (If you don’t have one or cannot afford one, try your local library, or ask around to see whether someone might be able to give or get you one.) You don’t have to read a lot at once, just set aside a little bit of time each day to read maybe 5 to 10 paragraphs. If you don’t understand something, read it anyway and don’t worry about that. Sometimes you’ll discover that they make sense later (when you’ve read further, when some experience gives you an “aha!” moment, when you’ve learned something elsewhere).
Pray each and every day, whether you “feel like it” or not. Set aside some time that you will pray every day, such as when you get up in the morning or when you go to bed. Even if you’re doing nothing more than putting aside distractions to spend some quiet time alone in the presence of God, it’s worth doing.