I'm quite engrossed in...

Meaning

I'm completely absorbed in...

Examples

• John: Did you hear me?
• Alice: Sorry, I was working. <b>I'm quite engrossed in</b> finishing this project.
• John: Take your time, but let's chat later.
• Alice: Will do, once I'm done. <b>I'm quite engrossed in</b> meeting the deadline.