Welcome. You have very good questions. I am still new here myself so I can't answer many of them but I can tell you this. You may post whatever you want and the people of steem will let you know if they like, or dislike it with the up-votes and the down-votes/flag. If it is well recieved then you will get lot's of upvotes and comments. If it is not well recieved then you will not get many upvotes and may possibly get flagged. I hope this help a bit at least. Have a great day and Steem on.