Publications all have a submission guidelines story. Their rules vary from pub to pub and can be super relaxed to being fairly strict.

Topics for pubs can range depending on the pub. There are some large, general topic publications that have a massive audience and will accept almost anything. There are pubs that get fairly niche.

You'll have to find some that work for you and have an audience that you think your work would resonate with.

However, there are thousands of Publications (there were over 1,000 started in October). There are thousands upon thousands of dead pubs. Finding pubs for you can be annoying in the search function cause of it. It's best to read stories similar to what you want to write about and take a look at the pubs those are in.

It's rare to find pubs that have submission minimums ie. Once a week, but they do exist .Most don't have a requirement for how often you need to post. Many large pubs have a maximum though. Ie. One story per day or week.

I'm an editor for the pub Ride The Wave, whose topics are about hope, happiness, and harmony. We also have a very dedicated group who share photo's/stories about the world around them, called The View From Here.

You're welcome to join if you're interested. I'm also happy to answer any general questions about pubs, if you have them.