St Louis de Montfort said that the reason the love of Jesus isn't as well known as He ought to be is because Mary isn't known. If we look around at our society today, especially in the disembodied versions of the faith promoted by the majority of Protestant churches, and at the philosophy of radical doubt of the secular order, it is not just the purity of an objective Love of God that is missing but the incarnate Love of the Son of Mary.
How do we make that love known? How do we make Mary known? One way is through the work of the Legion of Mary. I have been a Legionary since just a few months after my conversion, and have found great graces in Legion work.
In the Legion of Mary, we meet every week, pray the Rosary together, have a time for spiritual reading and spiritual direction, and are given a substantial apostolic work to do in the coming week. We always work in pairs, as Christ sent His apostles, and the work ranges from working in a local homeless shelter, knocking on doors around the parish, running a book stall outside the library, during Christmas and Easter we set up a crib or resurrection scene in a public place and use that as an opportunity to reach out to people, there are other works that can be done, including visiting schools, hospitals, retirement homes, organising public talks on the faith, and anything else that is in the spirit of Mary serving Christ in the Church. The work usually lasts about 2 hours each week, and then we come back together to share a story of what happened, and to encourage eachother. I've seen the huge difference the Legion can make to a parish.
There are also Auxiliary members of the Legion, who commit to pray the Rosary, Magnificat and Legion prayer for Our Lady's intentions each day. The work of our auxiliaries is even more important than the active Legion work.
One thing which unites all the work of the Legion is the promotion of the Miraculous Medal, which was revealed by Our Lady to St Catherine Laboure, and which bestows great graces to those who wear it and pray the prayer "O Mary, conceived without sin, pray for us who have recourse to thee." I have seen the way this simple little tin medal can change the whole nature of a conversation about the faith, bringing joy, acceptance, curiosity, understanding.
If this sounds like the kind of difference you want to make, you might want to find a Legion of Mary group (known as a praesidium) in your area.
You may, of course, be called to some other apostolate in the Church, such as the charitable work of the St Vincent de Paul Society, the apostolate of Opus Dei in sanctifying work, the work of a Salesian co-operator with young people, the contemplative life of a Carmelite Tertiary or Benedictine Oblate, but it sounds to me like what you want to do is to tell the world about the hope you have because of our faith. I can't think of many better ways to tell the world than through the Legion of Mary.