Results vary from person to person. Factors like your niche, target audience, number of posts per month all influence how fast you will grow!
One of my clients is a career strategist and everyone who has a job can be her target audience. We grew her account from 700 followers to 450K in 6 months.
My niche is social media marketing for business owners. We grew my account from 0 to 100K in 7 months.
But in both cases, we built strong personal brands, 10xed our business, and have loyal followers that consist of our target customers.
Compared to paid marketing options social media looks a lot less appealing. But the results you get are so much more worth it even if it takes longer to get them. I am glad it’s hard because otherwise, everyone would do it.