Hey @mollymoll. Welcome to steemit. I would suggest you write about the subjects you have suggested yourself since they seem like very interesting ones and all are areas which enjoy success when properly executed here.

I would suggest you take some time to get the feel of the place and comment on some posts you find interesting and then just let your creativity flow. Say what you want to say and you will find your place here, my friend.

Glad to have you with us Molly. Hope your day is going well. :)