90 days free trial is real.
I'd like to put additional thoughts to the current situation. Invest in learning ecommerce, and marketing. Shopify has a great resources to support merchants. For example Shopify Academy https://www.shopify.com/academy There you can find courses about Shopfiy and master it, Facebook Ads, SEO, How to design your store and other. When you got knowledge, you apply to the Shopify store and prepare to the time when the diseases go away.
But there are two choices for you:
1. remove your current store, then restart another new store on Shopify and get the 90-day-free-trial
2.If you’re currently on a 14-day trial, you can extend it to 90 days.But the question is how to extend it to 90 days? And I can't how to make it and there is not a document that tell us how to set.