Welcome on the Steem.
Thank you for your introduction. If you need help, please feel free to ask. No one is shouting out „RTFM!“. Steemians always helping each other.Use this Steemit FAQ too. It is a very helpful collection. Steemit development is in Beta stage. Some things may seem to be strange. Just ask!
For editors the Markdown Styling Guide is an important source.
Below every editor window (comments, postings), you will get the Preview.
Including Images in Your Post