Assuming you’re a US citzen:

0. Identiy that the fault is how we fund healthcare, not “government meddling” or “bad researchers”.
1. Pick a major political party.
2. Register as a member and find out where your local meetings are.
3. Make clear that the ONLY issue you care about is fixing healthcare.
4. Volunteer, donate, or run if you can.
5. Vote in every general, primary, or special election for whomever makes fixing healthcare a priority. Spoil if you must, but VOTE.
6. Dont fall for lies.

Fixing healthcare funding is itself broadly popular, but since its inherently unprofitable to care for sick, disabled, or elderly people all possible fixes are either “socialism” or “die quickly”

Healthcare should be like roads or schools or calling the police, not like cars or contractors or hiring a lawyer.