OK, I've changed the thread title to a more appropriate sentence.
This is a well covered topic, and a search for Opel Speedster (in particular in the 200 pt A-spec section) would have landed you numerous threads and responses that can help you.
First and Foremost, DE's settings above, use an NA (non turbo) version of the car, fully kitted out, and finally, learning how to drive (in other words, practice).
Now for your next adventure, "The Search Button"