What are some first-day -on-the-job experiences that would make you feel good about your employment decision and your new employment? why would they make you feel good?

In my professional career I have changed many jobs and each job had different experience on the very first day. With every new job I have learnt many things and I considered them as skill addition in my profession.  

The first day of my job was good and I still have memories of that day as that day I experienced that importance of being employed and earn your own money. I joined the company as a content writer and I was happy about my employment as this was the job which gave me freedom to mold my knowledge and views in to my own words and thought processing way.

This employment/ job made me realize that I am responsible to provide exact and right knowledge to the readers. My each job motivated me to grow more and learn more with new challenges and opportunities.  

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.