Good morning, Saaniya Aamir, and welcome to our writing world! You are experiencing normal here; the others who write about a huge audience their first week are anomalies. Some may already have large audiences on other platforms that follow them to Medium. Others may be social media experts who promote their posts over multiple sites. And, some might be writing technical articles that easily become viral but within the techy groups.
For the rest of us, it takes time and effort. Connect with others as often as you can. Become a writer for publications. If your goal is to make money, choose the publications with the most followers. You’ll get there, later than some but sooner than many.