Being professional is the first thing that is needed when you step into any organization. There are many things that are required to keep in mind while working or starting up any job. Being polite is very important to appear perfectly professional.
When you are starting your real first job, you need to appear perfectly professional to give a good first impression on others. You need to avoid usage of bad words and there is no need to gossip initially about anything or anyone. Stay neutral and not to flirt with anyone to make your reputation right.