Adding Stories/ Posts

Hello all I had a question and was wondering if anyone could assist me as I am extremely new to this. I am looking to put together a site basically where people are able to send me stories where I can privately read them and the public doesn’t have access to see it.

I want to have a term and agreement check box or page where they can read that whatever they submit would be on them, and they understand the content could be used and once they check that they can post their story and submit it (also maybe the option of leaving their name), and hopefully what they write would be kept on a page/ or somewhere where no one else can read them but me.

Is this possible to do?
Can anyone direct where I start, I’m good with putting the design of my site together and getting things running just not too sure on the stuff mentioned above.

Thanks very much in advance!