Many instructors offer short, "taster" courses for free. These might focus on a specific skill (like reading) or provide a general overview of the test format.
Many premium instructors offer 100% off coupons for a limited time to get reviews on new courses. Check IELTS preparation forums, Reddit communities (like r/IELTS), and coupon aggregator sites for these direct links. The Trade-offs of Free vs. Paid Udemy Courses ielts udemy hot free courses
This is where you utilize the "hot" skill-specific courses. Many instructors offer short, "taster" courses for free