how i can get Appian site for practice purpose, as of now when i try to access it am getting this message. The popularity of Appian Community Edition has been soaring. To ensure that every user can access the resources and support they need, we have introduced a queuing system that will process requests in a prioritized manner. The Appian Community Edition team prioritizes access for learners working towards an Appian Certification, small teams, and prospective customers of Appian.
where i can practice and how to access it
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You should eventually get it. Usually takes a couple of days.
No other way. If you have a friend who already has it, then you can ask them to create an account for you and use it for practice.