Category for annoucements on my website

Hi everyone,
Please there’s somehow urgent help I need if someone can give me an idea. I would like to create a page on my website. the website will be used to add news and be updated frequently. I wonder what can I use for that.
should use one page and every news as a post. or for every news create a new page. also I heard about CMS for management, would you recommend me a good one that I can use.
any relevant information would be much appreciated.
Thank you