Have I correctly used 'followed,' had,' and 'from' in the sentences?

Have I correctly used 'followed,' had,' and 'from' in the sentences?

On the first day of my cousins' intramurals, an opening program was held at 6:30 a.m., followed by Zumba, a fun aerobic workout mixing in dance moves, on/at the quadrangle. Then, they had morning break and prepared for the day’s activities from 7 to 11 a.m.