We understand that you want to do a full check list before you proceed to do a campaign launch.
Here are some of the checker to test if they are set up correctly.
For domains, you may use SPF and DKIM check.
For email deliverability, use Mail Tester.
For leads, check this using this tool.
For campaign schedule, you may use check this.
For campaign options, you may check here by using this tool.
If something is wrong, you may use this guide to fix it.