Engine shakes only on first start of the day

Hello,

Just to clarify, this only happens in the morning on a cold engine?
We can start with the basics. First of all you might need to do a tune up, if it has been a while.
It could be caused by a faulty sensor that does not provide accurate signal to the vehicle. It could be as simple as cleaning out few components like mass air flow sensor or throttle body.

Here are guides that will show how to clean these components:

https://www.2carpros.com/articles/throttle-actuator-service

https://www.2carpros.com/articles/mass-air-flow-service

Here is a guide to help you tune up your engine:

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Please let me know after you go thru the process and see how it drives.

Thank you.