I am trying to build up an Engagement Program, We have first email with followup email and I want to schedule the first email today with A/B testing can we able to create that in Engagement Program, please help.
The EP will enable you to send the 2 emails and set an non automated A/B test for the first one (a.k.a Campion/Challenger A/B test). This means that you will have to return and declare a winner manually. This is done by right-clicking on the email, and select "add test".
But if you want to send the second email based on some conditions about the first one (for instance send it to people who did not click the first one), you will be better will a regular program and smart campaign.