In the vestibule of St. Josaphat, you will find red Latin/English missalettes, with green inserts that have the propers of the Mass (the day’s unique readings and prayers). These are designed to assist you in following along with the celebrant. You don’t need to know Latin.
Others on this board have recommended that at your first TLM, you shouldn’t even try to read along in the booklet, but rather take in the sights and sounds of the Mass. Sit near the front, but not at the front, so that you can observe the Mass up close, but can stand, sit, and kneel following the lead of others.
The TLM progresses much as a Novus Ordo Mass, so you will recognize the basic elements of the Mass (readings, offertory, Eucharistic Prayer/Canon, etc.). What you will find most different is the silence, use of chant, and focus on the Mass as a sacrifice. If you do read along in the missal, you will see that, compared to the Novus Ordo, prayers are lengthier, more specific, more focused on the unworthiness of the priest to celebrate such an august sacrifice.
Don’t be fearful of the TLM; think of it as a great part of our Catholic heritage that you will be witnessing for the first time. Its reverent tone may help you to understand why so many martyrs died for our Holy Faith.
After Mass, come over to the social hall for the reception. You’ll find many people happy to assist you in becoming more familiar with the TLM.