Welcome to the forums!
I guess it's best to start at the starting point: ask yourself where are you in the faith? Do you pray daily, attend Mass regularly, understand the teachings and try to live them?
It is always a good idea to have some good old-fashioned Catholic reading material handy, something that belongs to you, that you can use regularly and refer to when you need to do so. If you don't already own a book of Catholic prayers, I'd recommend a trip to the Catholic bookstore/gift shop.
Regular Mass attendance can be a real anchor for your faith. It is one of those things that can slip off your schedule really easily if you don't make a concerted effort to go. Attend some of the events of your parish, and surround yourself with other practicing Catholics, as it will strengthen you to be around those who believe and worship as you do.
It's so good you're interested in growing in the faith. Ask around and find out which parishes have activities for young adults who want a good formation. Also see if Opus Dei conducts activities in your area. They have retreats and evenings of recollection. Their priests also provide spiritual direction and formation. I got a great foundation through Opus Dei.
Get into the practice of praying every morning and every evening. As you get out of bed in the morning and head back into bed at night, kneel beside it and spend a few minutes speaking to God - even (or especially) when you don't particularly want to do so.
Reading has made many saints. There are lots of great books and online resources. Look into these.