Ivanhobe
The Extraordinary Fan(boy)
watching something like 300 episodes
Be a man, PreCure only has like, 525 episodes and 17 movies at the time of this writing.
But if you still find that a bit too daunting, maybe watching some of the movies will soften the blow.
I have barely mentioned them but there are some very good movies that you could watch; there is the seconds Max Heart Movie which i have taken the liberty of branding as "The Die Hard of Magical Girls"; there is also the first YPC5 movie which i mentioned briefly and it is pretty good provided that you don´t mind wheeping like a man; the HeartCatch movie is pretty damn good (it has even made its rounds in a few anime conventions/screenings) and if you are interested in Smile then the Movie is a pretty good option since its combination of all the best things in the series.
Oh, and in the Fresh Movie Cure Peach basically fights Bruce Lee. And wins.
Thinking about it, there´s also the crossover movies which are always fun, and of those i usually recommend the first PreCure All-Stars DX movie; it has every character up until that point, the plot is simple but does what it needs to do (i.e. gather all the Cures for a single massive battle) and it has a stupid ammount of action.