One of the great things about the Catholic Church is that it is truly catholic, i.e. universal. While we might stem from different liturgical traditions, we can feel at home at any of our churches because it is Christ, particularly in the Holy Eucharist, who unites us.
That being said, I can understand the hesitation of attending the Divine Liturgy in a tradition to which we are not accustomed. As ast82401 said, you can watch videos on Youtube (https://youtu.be/n3zurm-jcVU
) or just search around on Google to become more familiar with the Divine Liturgy. The following link by author and speaker Frederica Mathewes-Green, while addressing first-time visitors to an Orthodox church might also be helpful for anyone visiting a Byzantine church.