Hey Sanjana,
I have been maintaining our company newsletter single-handedly for the past many months. I hope I can help you.
You can name it as "Connect" or "Waves" or something innovative like this. Regarding articles...
First page should always be filled with the news of your company like From the CEO's Desk or Operations Desk, Monthly Review Meeting highlights (if you have any such), Star Employee of the Month, New Joiners, Birthday wishes, and more.
The second page should be titled "News from Office." On this page, you can try writing small write-ups with photographs on the events that happen in your company, such as marriages, birthday celebrations, or any events conducted by your company. This page depends on the kind of industry you are in.
The third page should inform your employees about a policy each month. You can also add an article called "Corporate Hero," where you would write about Corporate Heroes like Ray Kroc (McDonald's), Karsanbhai K Patel (Nirma), Dhirubhai Ambani (Reliance), etc. An interesting article to include is "Know Your Colleague," where you write an article on one of your employees every month. You could even do two if you want to. Conduct interviews with your employees, gather some interesting insights from their lives, and then go ahead and print them. I enjoy doing it. I hope you will too.
The fourth page should contain fillers such as Horoscopes, Corporate cartoons, Quizzes, amazing facts, and more. For corporate cartoons, glasbergen.com is a wonderful site.
I am suggesting a newsletter format on an A3 Sheet. If you are planning something different, do let me know. I will see if I can help you in any way.
I hope this information will be helpful to you in one way or another.
Good luck for your new endeavor.
Regards, Kiran.