Difference between idea and a thought.

As I’m doing the worksheet for day 2 this month, I’m wondering what is the difference between an idea and a thought. Most of my answers were more what I was thinking to create the accomplishments. I looked it up on google and it seemed to be an idea involves a plan, but I’m still wondering if I did this correctly. Some of my answers did not have plans at the time of the idea, but mostly a thought like wouldn’t it be great if, or I’d be happier if. Thanks in advance for your answer.