Brothers and sisters: Faith is the realization of what is hoped for and evidence of things not seen. // Hebrews 11:1
It has been said that Saint Francis de Sales wrote that you learn to speak by speaking, to study by studying, and to love by loving. By his logic, we also learn to have greater faith by putting that faith into practice. It's a thing we have to do—to live out, for it to grow (source).
A beautiful way to put that into practice is to pray, to enter into a conversation with Our Father in Heaven, to trust that He is listening and wanting our good, and to look for how He already is responding and working in the details of our lives. He did it for the disciples, and He does it for you.
You can pray the Rosary and learn about Jesus' life with each mystery. You can spend time with Him in silence at Adoration. You can be united to Him at Mass. You can begin your day with a Morning Offering and end your day with a prayer of thanksgiving. Each of these practices offers a space where your faith can grow in any season of life and with any set of prayer intentions you bring.
As we work on our faith, let's remember, too, that when the Apostles asked Jesus to increase their faith, the Lord replied that they only needed to have faith the size of a mustard seed (see Luke 17:5-6). So let's ask Him to increase our faith now, and let's put it into practice and let it grow. Little by little.