I am a senior in highschool, I started switch hitting 3 weeks ago and i already can do it, with more power then i can hit on my right side. I cant make as good of contact but power is increased, So i say it will take your 14 year old about a month to get decent at it, and maybe half a year to be confident at the plate. I have done this myself, im not a coach. I know from experiance, and that is the best way to take advice.
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