Honestly? Autocross the lude then buy your first racecar. Do some research to see how easy it will be to obtain race parts for this gen lude. For mine, it has been a challenge. It doesn't sound like you've done any HPDEs with the car yet, so that will be your next step (in stock trim). Start volunteering / watching some SCCA Club Races if you haven't been already.

Then again, I was silly and built my Prelude like you're planning to do. LOL