This Guide assumes, that you're aware enough of core Jira features and functionality. Therefore this Guide will not cover any aspects of this topic. If you're feeling that you're missing something on Jira, you probably should begin from the start, i.e. Jira features description and native Jira onboarding.
This Guide assumes, that you're introduced to Agile, Scrum and Planing Poker estimation concept, therefore it won't cover any of these topics.