Automate RPA challenge URL

Can we only use Appian RPA for automation without creating any applications from Appian? I want to create a bot for this: "">www.rpachallenge.com/.". I want to automate this site. For this automation, I have one Excel file, read the data one by one, fill it on the RPA challenge form, and click submit.
Is it possible in the Appian RPA? if possible, then how can we start the process?
is there any need to excel data store to database?

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