Generally you get 30 days max for creating shopify stores. But with this link you will be able to try out all of shopify's features of whole 2 month. In this duration you can familiarize the platform and all the things you can do with Shopify.
If you are a shopify developer or a newbie, you can try this out to familiarize with the basics and also the liquid theming system to create and test shopify themes.
The code is:
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