The standard Atlassian docs do a good job of a step by step guide from what I've read, I've been able to train other Jira admins by saying "read the docs then come back to me when you're stuck" - they do get stuck, but it's always on the more twisted requirements or complex config.
>In a project when a specific component is selected, I want several users to be assigned different issues.
This is a very vague definition. Do you mean you want an issue to go to a certain assignee if you select component X? (Have a look at "component leads" and "default assignees") or something else?
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