Having a hard time with 20 fails

I’m going to do an impossible goal of starting my biz and making $100k. I am the person that always asks about crocheting. My idea is a blog. But I can’t come up with that many fails, and I found myself changing my business plans. I planned on basically making money as an affiliate. But trying to come up with fails has me thinking I will sell dolls, or crochet rugs, or go on Instagram and make money there…. I’m having a hard time figure out the fails and what exactly I should be failing at. Any tips? Is it ok to mess with my business plan and see what works and what I end up liking the most?