Sending Emails to outlook via Excel with 2 tables

Hello,

I have a complicated requirement!
I have a list of more than 300 participants to whom I have to assign different depts. (Sheet-Email, Range N to S) for their orientation.

We have to send emails to each and every participants along with their assigned depts. table., and also table 2 given in Sheet-Dept Details., where the Dept's contact details, timings, POC etc. are mentioned.

In column E (Email Body), I have explained the way how my email draft should look like. For each participant it will be different. (Because of the tables)
Can someone help to create a user form with all these requirements?

Also when clicked on send button, I want it to directly send emails and not wait for me to again click on send button in outlook.

I have always got solutions here, I hope this gets solved too!