If you think extemporaneous speech calls for a script then maybe you should pause and reconsider whether you are ready for prime time. But hey, if you want to, knock yourself out.
Do it. The Book “winning Local and State Elections” might be worth purchasing. The section on targeting your audience will show you how to read the prior polling results and target likely voters. where they live. You might be surprised. I did pubie first and then libertarian. i learned alot. You can get for free or minimal dollars all of the voting information by precinct. not who voted for who but the detailed voting demographics of your voting area. The book “Mises made easy” is glossary of the terms used in his book “Human action” it can come in handy to get a handle on words. If you can read “Human Action”
The “good-old-boys” in the GOPe will decide who runs and who doesn’t. They will need to find another RINO to replace this one. I doubt you would fit their profile.