What should I do first after signing up?

Add a project for your website (domain, country, up to ten competitors), then upload the keywords you care about on the project's Keywords tab. Positions arrive within the hour. While you wait, open Domain overview for a competitor and the Keyword gap to see what they rank for that you do not.

Part of Getting started in the Serpified knowledge base. Answers are kept current with the product; if one is out of date, tell us and we fix it.