Originally Posted by cjs
Earlier the better before you learn bad habits and bad techniques that have to be unlearned.
Exactly! Tennis is not really an intuitive sport and the vast majority of the folks who take up the game can't develop decent mechanics, etc. on their own. Without any foundation, a newcomer will employ whatever compromises in their movements and swings to get the strings to the ball. That's a recipe for stagnation and frustration.
With a little awareness and understanding of better habits learned early on, lots of newer players can use that foundation to work in a better direction.