What are two ways you form community with other Catholics?

Answer 1

Under "Community" in the Catechism of the Catholic Church, the index lists (so obviously you are going to have to make your question more specific):

Baptism and

of believers

celebration of funerals and

the Church as communion

common good and

Confirmation and responsibilities in the ecclesial

Ecclesial community and the apostolate of the laity

ecclesial community and prayer

economic activity, social justice, and the human

Eucharist and the community of the Christian faithful

faith and community of believers

families in difficult situations and

first community of believers and their faith

forgiveness and reintegration into the

government of human

liturgy and

marital community and the family

mission to establish Christian

parish as communion

political community

and the Church

and the family

and the rights and duties of citizens

priesthood and the community of believers

religious freedom and religious communities

universal

vocation of the human