start with town commissioner or school board perhaps, then run for mayor or city counsel of your town. Once you've built a reputation as a great mayor perhaps the next step is to run for something in the state-Congress or Senate. That is where you can help make change in your state. https://nj.gov/state/elections/candidate-information.shtml

They aren't going to come to you, you've got to do some research in your state. Connect with any local GOP headquarters as a good first step. Start attending govt meetings that are open to the public. Build a reputation as a strong conservative and network.