There isn't anything you do that will have instant effect. You can talk to the police without agreeing to waive any of your rights - like being free of searches. You really will need to interact with the police in a community way and present yourself as not involved in drugs. You could try speaking with local media, community and religious groups. Look for allies who will publicly support you. Find out who represents you at various levels of government and write them. Ask for an appointment at their office. Go to a local government meeting and explain your situation and what you are trying to accomplish.
Yes it is true that you may have some ongoing issues with police. They have a pattern. You have to be a part of breaking that pattern and making this place your home.
Yes, interacting with the police is stressful. Practice being assertive. You can be assertive and polite. Be proactive.
This is your home and you are improving the community. You deserve to be proud of what you are doing. Keep your head high.