Learning ballroom dancing is very simple. If you have a good foundation, you can learn quickly by watching videos. The most important basic skills are your grasp of the rhythm of dance music, your understanding of the basic steps of each dance, and whether you can step on the beat correctly.
"Practice more, watch more and learn more", find a sense of dance, have the opportunity to dance with those masters, feel their expressive force and guiding ability, and watch videos. As long as you practice often, you will soon become a master of ballroom dancing.