The best resource for small group forming, appropriating, or participation is the Holy Spirit. He is the gift of Christ for that very purpose. For the desire and the direction to locate an appropriate spiritual group in your parish, or to begin one yourself, ask the Holy Spirit for help. He will assist you.
Essential for small group formation are prayer, scripture, and discussion. A weekly hour meeting can amply provide the spiritual growth for a small group with prayer, scripture reading, and discussion. A parish bulletin announcement that gives the parish approved space and time of your meeting will direct searching men to your event where the Holy Spirit may touch their hearts and provide new directions for their Catholic walk. Below is an example for such a small group meeting.
A...... Free and open prayer for group participation.......5 minutes.
B......Shared scripture reading around the table..........10 minutes
C......Discussing the shared scripture for meaning......30 minutes