Mono fin question

Hi, l'm a senior citizen who is just starting to swim Fly, it's slow and not pretty yet, but my question is: Would a mono fin help train me to keep my feet together? If so, does anyone have a suggestion as to which one to buy? Thanks in advance Pam
  • A monofin would force your feet to kick together, I’m not sure the monofin trains them. Can you do a dolphin kick with a board? How about with fins or vertical kicking or on the wall? What is the problem you are trying to correct?