The area you ask for information on (how to express Catholic spirituality) is so vast that all you are likely to recieve is many, many links. Perhaps you could give us an idea of your desires and we could then tell you which specific areas would be best to concentrate on.
There are many important facets of a prayer life, but most people find themselves called to a particular aspect more than others. Have you studied the lives of the saints? If not, I recommend it. If so, which ones spoke to you? And why?
The most common devotions you will hear on this board are saying the rosary and adoration of the blessed sacrament. However, Catholicism has much more to offer. Some saints (and faithful) work to change themselves through internal meditation, contemplation, study, etc. Some prefer to speak with their actions, always conforming their will to the Lord’s through what they DO. (Saint Theresa of Lisieux is the most popular, but I prefer Saint Stanislaus’ phrase: I find a heaven in the midst of saucepans and brooms.) Some are called to do the “common” things: parenthood, marriage, local ministry, etc. Some are called to the extraordinary: missionaries to hostile areas, jailings or even torture for the faith, martyrdom. This might not sound like a list of spirituality practices, but I assure you it is. The way we live our lives, always working to bring our steps in line with the Lord’s, is our path, our journey, our spirituality. Therefore, the life we are called to dictates the expression of our spirituality.
The Eastern church has a concept of deification that more clearly outlines this concept of uniting ourselves to Christ. They emphasize prayer, church attendance, alms giving, fasting, abstaining, and much more all as necessary aspects of this process. However, you might be interested to note that the Eastern churches (of which Catholicism has some 20 of) have much more flexibility even in the communal church services on how this is lived out. For example, during church people might prostrate themselves, make the sign of the cross, etc when not “prescribed” just as the Spirit moves them. The only comparison in the western church is to Charasmatic Catholics, which emphasize the gifts of the Holy Spirit (such as speaking in tongues). But there really is no comparison there. Also, the Eastern churches do have many more fasting days which are strongly held to, but not legalistically. The spiritual director and the person together decide what is best for the person’s physical and spiritual health. In other words, the living out of your spirituality depends entirely on your current spiritual and physical place in life. The point is to always keep moving closer to the Lord. How you do so is so varied a path that you really must give us some clue as to your callings before we even could provide relevant readings for you. More importantly, spirituality is simply not something you can attain through reading, as it must be lived.
I recommend you find your “niche” or calling (through prayer, discernment, and study) and then you can find where in your area you can best live this out.